When these terms end
Held patents by the year their term ends
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
Ends Nov 2028 · High confidence
Also notable
Ends Jun 2032 · High confidence
Also notable
Ends Jul 2028 · High confidence
Process Cartridge, Electrophotographic Image Forming Apparatus, and Electrophotographic Photosensitive Drum Unit
US 8,280,278
Cited by 319 later US patents, top 1% of utility patents granted in 2012 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2028.
Developer Supply Container and Developer Supplying System
US 11,137,714
Cited by 84 later US patents, top 5% of utility patents granted in 2021 in our data. Protection runs to 2032.
Electrophotographic Image Forming Apparatus, Developing Apparatus, and Coupling Member
US 8,437,669
Cited by 199 later US patents, top 5% of utility patents granted in 2013 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2028.
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.
- 162 fees due Nov 14 to 30, 2026 · next Nov 14
- 554 fees due Dec 2 to 30, 2026 · next Dec 2
- 577 fees due Jan 2 to 30, 2027 · next Jan 2
- 652 fees due Feb 1 to 28, 2027 · next Feb 1
- 668 fees due Mar 1 to 29, 2027 · next Mar 1
- 708 fees due Apr 1 to 30, 2027 · next Apr 1
- 682 fees due May 3 to 28, 2027 · next May 3
- 849 fees due Jun 1 to 30, 2027 · next Jun 1
- 493 fees due Jul 2 to 30, 2027 · next Jul 2
- 531 fees due Aug 2 to 27, 2027 · next Aug 2
- 602 fees due Sep 1 to 30, 2027 · next Sep 1
- 554 fees due Oct 2 to 30, 2027 · next Oct 2
- 252 fees due Nov 3 to 12, 2027 · next Nov 3
Recent changes
- Nov 11Assignment recorded on 1 record: Numata, Kazuya and 1 other to Canon Kabushiki Kaisha Recorded Nov 11, 2026, executed Oct 6, 2026. Conveyance as recorded: Assignment of Assignor's Interest. A recorded assignment is a filed document, not a statement of current ownership. Reel 76708, frame 519.
- Nov 11Assignment recorded on 3 records: Canon Medical Systems Corporation to Canon Kabushiki Kaisha Recorded Nov 11, 2026, executed Oct 20, 2026. Conveyance as recorded: Assignment of Assignor's Interest. A recorded assignment is a filed document, not a statement of current ownership. Reel 76713, frame 565.
- 955 of the patents on this record were granted since Aug 16, 2026
- 592 terms have ended since Aug 16, 2026
What they patent
The 5 largest of its 26,544 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Interchangeable Lens for Camera | 38 in force | to Feb 2039 |
| Drum Unit, Cartridge and Coupling Member | 17 in force | to Feb 2036 |
| Developer Supply Container and Developer Supplying System | 15 in force | to Jun 2032 |
| Image Forming Apparatus Detachably Mounting a Process Cartridge Having Developing Roller Movable to Contact and Be Spaced from a Photosensitive Drum | 15 in force | to Jan 2027 |
| Process Cartridge, Electrophotographic Image Forming Apparatus, and Electrophotographic Photosensitive Drum Unit | 14 in force | to Nov 2028 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,295,381 | Zoom Lens and Image Pickup Apparatus Having the Same In force · High confidence | In force | High confidence | |
| US 7,862,653 | Aqueous Ink, Ink Jet Recording Method, Ink Cartridge, Recording Unit and Ink Jet Recording Apparatus In force · High confidence | In force | High confidence | |
| US 7,424,249 | Image Forming Apparatus Having Door Positioning Device In force · High confidence | In force | High confidence | |
| US 7,561,744 | Image Encoding Apparatus, Image Decoding Apparatus, and Their Control Method, and Computer Program and Computer-Readable Storage Medium In force · High confidence | In force | High confidence | |
| US 7,502,574 | Image Forming Apparatus Including a Seal Member in Contact with an Image Bearing Member and a Flange Provided at an End of the Image Bearing Member In force · High confidence | In force | High confidence | |
| US D671,165 | Ink Ribbon Cassette for Printer In force · High confidence | In force | High confidence | |
| US 7,379,693 | Developing Apparatus In force · High confidence | In force | High confidence | |
| US 7,412,183 | Image Forming Apparatus Including a Billing Unit, a Method for Controlling the Image Forming Apparatus, a Control Progam, and a Computer-Readable Store Medium In force · High confidence | In force | High confidence | |
| US 7,433,588 | Camera Control Apparatus, Camera Control Method, Program and Storage Medium In force · High confidence | In force | High confidence | |
| US 7,424,239 | Image Forming Apparatus Having a Function of Adjusting an Image Formation Condition In force · High confidence | In force | High confidence |
Also on record, not counted in the 30,672: 195 patents in force now held by others · 31,033 patents ended · 8,137 applications pending · 9,132 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.