54 patents currently held

4 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.

The next term ends in Mar 2027. from the record

Free plan: 3 watched companies. Pro: unlimited.

Alerts on its grants, lapses and transfers.

Ending by 2030

Mar 2027

Next term end

Patent families

When these terms end

5 yrs10 yrs20 yrs

Held patents by the year their term ends

20262027 20282029203020312032 203320342035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045

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

Personalized Avatar Responsive to User Physical State and Context US 9,883,838

Cited by 490 later US patents, top 1% of utility patents granted in 2018 in our data, and renewed at every maintenance window due so far. Protection runs to 2033. A terminal disclaimer caps this term to an earlier patent's.

Ends Oct 2033 · High confidence Also notable

Atomic Layer Deposition Apparatus US 8,968,476

The most cited patent in this portfolio, cited by 504 later US patents, top 1% of utility patents granted in 2015 in our data. Protection runs to 2032.

Ends May 2032 · High confidence Also notable

Vehicle Auxiliary Light Luminaire Bezel Attachment Assembly US 11,486,556

Cited by 5 later US patents, top 25% of utility patents granted in 2022 in our data. Protection runs to 2040.

Ends Nov 2040 · High confidence

Formerly held, still cited

Notable

Methods of Using an Enhanced Therapeutic Stimulus for Non-Nutritive Suck Entrainment System US 11,234,607

Granted 2022. Computed term ends 2032.

now held by Innara Health, Inc.

Ends Jul 2032 · 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 13, 2026
The maintenance fee for Vehicle Auxiliary Light Luminaire Bezel Attachment Assembly (US 11,674,657) comes due Dec 13, 2026. Unpaid by Jun 14, 2027, it lapses early.
1 fee due Feb 27, 2027
The maintenance fee for Desalination Membranes for Subsurface Irrigation (US 10,390,500) comes due Feb 27, 2027. Unpaid by Aug 27, 2027, it lapses early.
1 fee due Mar 24, 2027
The maintenance fee for Abrasive Particle-Dispersion Layer Composite and Polishing Slurry Composition Including the Same (US 10,421,883) comes due Mar 24, 2027. Unpaid by Sep 24, 2027, it lapses early.
3 fees due Apr 1 to 8, 2027 · next Apr 1
3 fees due Jun 1 to 30, 2027 · next Jun 1
1 fee due Sep 10, 2027
The maintenance fee for Forward Osmosis Subsurface Irrigation System and Process (US 10,583,395) comes due Sep 10, 2027. Unpaid by Mar 10, 2028, it lapses early.

Which patents, and when each one lapses · Pro

Recent changes

3 of the patents on this record were granted since Aug 16, 2026

What they patent

The 5 largest of its 40 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.

Virtual Avatar Using Biometric Feedback	13 in force	to Dec 2033
Vehicle Auxiliary Light Luminaire Bezel Attachment Assembly	3 in force	to Nov 2040
Slurry Composition for Metal Polishing	1 in force	to Jul 2043
Polishing Slurry Composition	1 in force	to Oct 2042
Vehicle Anchor	1 in force	to Mar 2041

Patents held now

Soonest term end first.

Patent	Title	Status	Expires	Confidence
US 8,361,177	Polishing Slurry, Method of Producing Same, and Method of Polishing Substrate held by Kctech Co., Ltd. In force Term ends Mar 10, 2027 · Medium confidence	In force	Term ends Mar 10, 2027	Medium confidence
US 8,062,547	CMP Slurry, Preparation Method Thereof and Method of Polishing Substrate Using the Same held by Kctech Co., Ltd. In force Term ends Jul 24, 2027 · High confidence	In force	Term ends Jul 24, 2027	High confidence
US 7,674,156	Cleaning Device for Chemical Mechanical Polishing Equipment held by Kctech Co., Ltd. In force Term ends Oct 13, 2028 · High confidence	In force	Term ends Oct 13, 2028	High confidence
US 8,491,682	Abrasive Particles, Method of Manufacturing the Abrasive Particles, and Method of Manufacturing Chemical Mechanical Polishing Slurry held by Kctech Co., Ltd. In force Term ends Apr 16, 2030 · High confidence	In force	Term ends Apr 16, 2030	High confidence
US 8,662,956	Conditioner of Chemical Mechanical Polishing Apparatus held by Samsung Electronics Co., Ltd. and Kctech Co., Ltd. In force Term ends Feb 13, 2032 · High confidence	In force	Term ends Feb 13, 2032	High confidence
US 8,968,476	Atomic Layer Deposition Apparatus held by Kctech Co., Ltd. In force Term ends May 31, 2032 · High confidence	In force	Term ends May 31, 2032	High confidence
US 8,939,817	Membrane Assembly and Carrier Head Having the Membrane Assembly held by Kctech Co., Ltd. In force Term ends May 29, 2033 · High confidence	In force	Term ends May 29, 2033	High confidence
US 8,882,563	Chemical Mechanical Polishing System held by Samsung Electronics Co., Ltd. and Kctech Co., Ltd. In force Term ends Aug 16, 2033 · High confidence	In force	Term ends Aug 16, 2033	High confidence
US 9,501,942	Personalized Avatar Responsive to User Physical State and Context held by KC Holdings I In force Term ends Oct 9, 2033 · High confidence	In force	Term ends Oct 9, 2033	High confidence
US 9,652,992	Personalized Avatar Responsive to User Physical State and Context held by KC Holdings I In force Term ends Oct 9, 2033 · High confidence	In force	Term ends Oct 9, 2033	High confidence

10 of 54 patents shown.

Pro members see all 54.

Pro members: see all 54 patents

Also on record, not counted in the 54: 4 patents in force now held by others · 10 patents ended · 35 applications pending · 10 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

KC Co., Ltd.