49 patents currently held

160 more in force are now held by other companies

Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.

39 more records may belong here and await a decision; they are not counted.

The next term ends in Dec 2026. from the record

Of the 160 now held by other companies, 72 name Howmet Aerospace Inc. as their current owner, and 88 more name another party. Each row says which.

Free plan: 3 watched companies. Pro: unlimited.

Alerts on its grants, lapses and transfers.

Ending by 2030

Dec 2026

Next term end

Patent families

When these terms end

5 yrs10 yrs20 yrs

Held patents by the year their term ends

2026202720282029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 204020412042204320442045

notable patents fee due within 90 days all others Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know

Notable: the highest-ranked patents in this portfolio by citations and family size. Fee due within 90 days: a maintenance fee is due within 90 days of when this page was computed and not yet paid.

Notable patents

Ranked by citations and family size, against patents of the same kind granted the same year. How we rank

Notable

Aluminum Alloys, Aluminum Alloy Products and Methods for Making the Same US 8,349,462

The most cited patent in this portfolio, cited by 50 later US patents, top 25% of utility patents granted in 2013 in our data. Protection runs to 2030.

Ends Oct 2030 · High confidence Also notable

3XX Aluminum Casting Alloys, and Methods for Making the Same US 11,584,977

Cited by 3 later US patents, top 25% of utility patents granted in 2023 in our data. Protection runs to 2037.

Ends Jul 2037 · Medium confidence Also notable

Process and Apparatus for Direct Chill Casting US 8,056,611

Renewed at every maintenance window since the 2011 grant; no more fees are due before its term ends in 2029.

Ends Jun 2029 · High confidence

Formerly held, still cited

Notable

Resistance Welding Fastener, Apparatus and Methods US 10,903,587

Cited by 26 later US patents, top 5% of utility patents granted in 2021 in our data. Protection runs to 2037.

now held by Howmet Aerospace Inc.

Ends Jul 2037 · High confidence

Also notable

Expanding Die and Method of Shaping Containers US 7,934,410

Cited by 68 later US patents, top 10% of utility patents granted in 2011 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2027.

now held by Kaiser Aluminum Warrick, LLC

Ends Feb 2027 · High confidence

Also notable

High Performance Sleeved Interference Fasteners for Composite Applications US 7,695,226

Cited by 91 later US patents, top 10% of utility patents granted in 2010 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2027.

now held by Howmet Global Fastening Systems Inc.

Ends Oct 2027 · High confidence

Fee deadlines

Maintenance fees fall due 3.5, 7.5 and 11.5 years after grant. A missed fee ends a patent at the end of the six month grace period that follows, not on the due date.

1 fee due Dec 30, 2026
The maintenance fee for Decarbonization Process for Carbothermically Produced Aluminum (US 9,068,246) comes due Dec 30, 2026. Unpaid by Jun 30, 2027, it lapses early.
2 fees due Jan 11 to 16, 2027 · next Jan 11
1 fee due Feb 13, 2027
The maintenance fee for Fertilizer Compositions and Methods of Making and Using the Same (US 10,377,677) comes due Feb 13, 2027. Unpaid by Aug 13, 2027, it lapses early.
3 fees due Mar 1 to 12, 2027 · next Mar 1
1 fee due May 10, 2027
The maintenance fee for Recycle of Titanium Diboride Materials (US 9,181,101) comes due May 10, 2027. Unpaid by Nov 10, 2027, it lapses early.
1 fee due Jun 8, 2027
The maintenance fee for Aluminum Electrolysis Cell with Compression Device and Method (US 9,206,518) comes due Jun 8, 2027. Unpaid by Dec 8, 2027, it lapses early.
2 fees due Aug 2 to 23, 2027 · next Aug 2

Which patents, and when each one lapses · Pro

Recent changes

3 terms have ended since Aug 16, 2026

What they patent

The 5 largest of its 38 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.

System, Method and Apparatus for Measuring Electrolysis Cell Operating Conditions and Communicating the Same	3 in force	to Jun 2032
Apparatus and Methods for Filtering Metals	2 in force	to Feb 2039
Apparatuses and Systems for Vertical Electrolysis Cells	2 in force	to Jan 2038
Systems and Methods for Making Ceramic Powders	2 in force	to Jul 2037
Systems and Methods for Purifying Aluminum	2 in force	to Oct 2036

Patents held now

Soonest term end first.

Patent	Title	Status	Expires	Confidence
US 7,556,163	Lightened, Molded Plastic Closure Exhibiting Enhanced Strength held by Alcoa Closure Systems International, Inc. In force Term ends Dec 22, 2026 · High confidence	In force	Term ends Dec 22, 2026	High confidence
US 10,066,310	System, Method and Apparatus for Measuring Electrolysis Cell Operating Conditions and Communicating the Same In force Ends no later than Mar 26, 2029 · Low confidence	In force	Ends no later than Mar 26, 2029	Low confidence
US 8,728,385	Sidewall and Bottom Electrode Arrangement for Electrical Smelting Reactors and Method for Feeding Such Electrodes In force Term ends Apr 4, 2029 · High confidence	In force	Term ends Apr 4, 2029	High confidence
US 8,056,611	Process and Apparatus for Direct Chill Casting In force Term ends Jun 28, 2029 · High confidence	In force	Term ends Jun 28, 2029	High confidence
US 8,088,269	System and Method for Measuring Alumina Qualities and Communicating the Same In force Term ends Jul 21, 2029 · Medium confidence	In force	Term ends Jul 21, 2029	Medium confidence
US 7,931,737	Systems and Methods for Restricting Scale in Gas Scrubbers and Related Components In force Term ends Nov 5, 2029 · High confidence	In force	Term ends Nov 5, 2029	High confidence
US 8,950,465	Aluminum Alloys, Aluminum Alloy Products and Methods for Making the Same In force Term ends Jan 12, 2030 · High confidence	In force	Term ends Jan 12, 2030	High confidence
US 8,409,409	System, Method and Apparatus for Measuring Electrolysis Cell Operating Conditions and Communicating the Same In force Term ends Feb 5, 2030 · High confidence	In force	Term ends Feb 5, 2030	High confidence
US 8,252,156	Electrode Containers and Associated Methods In force Term ends Jul 22, 2030 · High confidence	In force	Term ends Jul 22, 2030	High confidence
US 11,041,250	Composition For Making Wettable Cathode In Aluminum Smelting In force Term ends Jul 28, 2030 · Medium confidence	In force	Term ends Jul 28, 2030	Medium confidence

10 of 49 patents shown.

Pro members see all 49.

Pro members: see all 49 patents

Also on record, not counted in the 49: 160 patents in force now held by others · 402 patents ended · 19 applications pending · 283 applications abandoned. List them

Sources and methods

Compiled from USPTO application file histories, grants and recorded assignments, with the company's own names reviewed by hand. How this record was built

Portfolio grouped automatically from ownership conveyances to the names matched to this company, usually every name that begins with its own, so it counts patents an affiliate holds; each list row names the holder of record. Security interests are excluded and ambiguous records are not reviewed by hand.

Fee due within 90 days marks a patent with a maintenance fee due within 90 days of the date this page was computed and not yet recorded paid, so it can end earlier than the bar shows. A fee left unpaid ends the patent at the close of the six month grace period that follows its due date, not on the due date itself. It is not a prediction that the fee will be missed.

Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.

Export every term end as CSV · Pro

Alcoa Inc.