27 patents currently held

28 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.

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

The next term ends in Apr 2027. from the record

Of the 28 now held by other companies, 14 passed to Parker Hannifin Corporation when this company merged into it, and 14 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

Apr 2027

Next term end

Patent families

When these terms end

5 yrs10 yrs20 yrs

Held patents by the year their term ends

20262027 202820292030 2031 2032 2033 2034 2035 2036 2037 20382039204020412042204320442045

notable patents fee due within 90 days all others Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 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

Apparatuses and Methods for the Deposition of Microfibers and Nanofibers on a Substrate US 8,658,067

Cited by 26 later US patents, top 25% of utility patents granted in 2014 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2032.

Ends May 2032 · High confidence Also notable

Devices and Methods for the Production of Microfibers and Nanofibers Having One or More Additives US 9,527,257

Cited by 15 later US patents, top 25% of utility patents granted in 2016 in our data, and renewed at every maintenance window due so far. Protection runs to 2034.

Ends Aug 2034 · High confidence Also notable

Filter Assembly and Filter Element US 10,702,807

Cited by 11 later US patents, top 25% of utility patents granted in 2020 in our data. Protection runs to 2033.

Ends Feb 2033 · High confidence

Formerly held, still cited

Notable

V-Bank Air Filtration System Such as for Animal Confinement US 8,747,505

The most cited patent in this portfolio, cited by 72 later US patents, top 10% of utility patents granted in 2014 in our data. Protection runs to 2032.

now held by Parker-Hannifin Corporation

Ends May 2032 · High confidence

Also notable

Filter Media Packs, Methods of Making and Filter Media Presses US 11,235,270

Cited by 10 later US patents, top 25% of utility patents granted in 2022 in our data. Protection runs to 2036.

now held by Parker Intangibles LLC

Ends Aug 2036 · Medium confidence

Also notable

Air Cooling System Incorporating Membrane-Free Filter And/Or Integral Framing for Filter US 9,504,945

Cited by 36 later US patents, top 25% of utility patents granted in 2016 in our data, and renewed at every maintenance window due so far. Protection runs to 2030. A terminal disclaimer caps this term to an earlier patent's.

merged into Parker Hannifin Corporation - now held by Parker Intangibles LLC

Ends Jun 2030 · 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.

2 fees due Dec 18 to 30, 2026 · next Dec 18
1 fee due May 10, 2027
The maintenance fee for Methods for the Production of Microfibers and Nanofibers Using a Multiple Chamber Fiber Producing Device (US 9,181,635) comes due May 10, 2027. Unpaid by Nov 10, 2027, it lapses early.
1 fee due Jun 17, 2027
The maintenance fee for Automated Water Drain System (US 10,508,631) comes due Jun 17, 2027. Unpaid by Dec 17, 2027, it lapses early.

Which patents, and when each one lapses · Pro

Recent changes

Nothing was recorded against this company's patents in the last 90 days.

What they patent

The 5 largest of its 18 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.

Multilayer Apparatuses and Methods for the Production of Microfibers and Nanofibers	7 in force	to May 2032
Devices and Methods for the Production of Microfibers and Nanofibers Having One or More Additives	3 in force	to Apr 2036
Fuel Filter Assembly and Cartridge	2 in force	to Feb 2035
Engine Panel Filter and Housing System	1 in force	to Sep 2037
High Molecular and Low Molecular Weight Fine Fibers and Tpu Fine Fibers	1 in force	to Aug 2037

Patents held now

Soonest term end first.

Patent	Title	Status	Expires	Confidence
US 7,442,292	Liquid Visual Display In force Term ends Apr 19, 2027 · High confidence	In force	Term ends Apr 19, 2027	High confidence
US 7,744,739	Spiral-Wound Cylindrical Electrostatic Oil Cleaner In force Term ends Mar 30, 2028 · High confidence	In force	Term ends Mar 30, 2028	High confidence
US 8,172,092	Filter Having Melt-Blown and Electrospun Fibers In force Term ends Jun 25, 2030 · High confidence	In force	Term ends Jun 25, 2030	High confidence
US 9,731,966	Non-Pleated Tubular Depth Filter Having Fine Fiber Filtration Media In force Term ends Feb 23, 2031 · High confidence	In force	Term ends Feb 23, 2031	High confidence
US 8,733,555	Pressure Resistant Filter Cartridge In force Term ends Dec 27, 2031 · High confidence	In force	Term ends Dec 27, 2031	High confidence
US 9,181,635	Methods for the Production of Microfibers and Nanofibers Using a Multiple Chamber Fiber Producing Device In force Term ends Feb 7, 2032 · High confidence	In force	Term ends Feb 7, 2032	High confidence
US 9,394,627	Apparatuses Having Outlet Elements and Methods for the Production of Microfibers and Nanofibers In force Term ends Feb 7, 2032 · High confidence	In force	Term ends Feb 7, 2032	High confidence
US 9,441,313	Systems and Methods for the Production of Microfibers and Nanofibers Using Multiple Fiber Production Devices In force Ends no later than Feb 7, 2032 · Medium confidence	In force	Ends no later than Feb 7, 2032	Medium confidence
US 8,778,240	Split Fiber Producing Devices and Methods for the Production of Microfibers and Nanofibers In force Term ends Apr 4, 2032 · High confidence	In force	Term ends Apr 4, 2032	High confidence
US 8,777,599	Multilayer Apparatuses and Methods for the Production of Microfibers and Nanofibers In force Term ends May 6, 2032 · High confidence	In force	Term ends May 6, 2032	High confidence

10 of 27 patents shown.

Pro members see all 27.

Pro members: see all 27 patents

Also on record, not counted in the 27: 28 patents in force now held by others · 14 patents ended · 1 application pending · 12 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.

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