SSLM Co., Ltd.
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
3
Ending by 2030
Sep 2028
Next term end
When these terms end
Held patents by the year their term ends
20262027202820292030203120322033203420352036203720382039204020412042204320442045
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 4, 2026The maintenance fee for Method for Producing Separator and Method for Slitting Separator Original Sheet (US 10,307,925) comes due Dec 4, 2026. Unpaid by Jun 4, 2027, it lapses early.
- 2 fees due Jan 4 to 9, 2027 · next Jan 4
- 1 fee due Feb 20, 2027The maintenance fee for Package of Porous Film (US 10,385,180) comes due Feb 20, 2027. Unpaid by Aug 20, 2027, it lapses early.
- 3 fees due Mar 17 to 26, 2027 · next Mar 17
- 3 fees due Apr 1 to 29, 2027 · next Apr 1
- 2 fees due Jun 24 to 30, 2027 · next Jun 24
- 1 fee due Jul 14, 2027The maintenance fee for Nonaqueous Electrolyte Secondary Battery Insulating Porous Layer (US 10,535,893) comes due Jul 14, 2027. Unpaid by Jan 14, 2028, it lapses early.
- 2 fees due Aug 18 to 25, 2027 · next Aug 18
- 1 fee due Sep 17, 2027The maintenance fee for Nonaqueous Electrolyte Secondary Battery Insulating Porous Layer (US 10,593,984) comes due Sep 17, 2027. Unpaid by Mar 17, 2028, it lapses early.
Recent changes
- 3 of the patents on this record were granted since Aug 16, 2026
Patents held now
Soonest term end first. Each date below is computed on that patent's own page, which shows the rule, the adjustments and the fee history it was derived from.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 8,323,837 | Porous Film In force · Medium confidence | In force | Medium confidence | |
| US 8,313,865 | Separator In force · Medium confidence | In force | Medium confidence | |
| US 8,404,377 | Separator for Use in Non-Aqueous Electrolyte Secondary Battery and Non-Aqueous Electrolyte Secondary Battery In force · High confidence | In force | High confidence | |
| US 9,882,191 | Laminated Porous Film and Non-Aqueous Electrolyte Secondary Battery In force · Medium confidence | In force | Medium confidence | |
| US 10,418,608 | Laminated Porous Film and Non-Aqueous Electrolyte Secondary Battery In force · Medium confidence | In force | Medium confidence | |
| US 10,147,923 | Laminated Porous Film, Method for Producing Same, Non-Aqueous Electrolyte Secondary Battery Separator, Laminated Electrode Sheet, and Non-Aqueous Electrolyte Secondary Battery In force · High confidence | In force | High confidence | |
| US 9,525,189 | Adhesive Resin Composition for Secondary Battery In force · High confidence | In force | High confidence | |
| US 9,705,120 | Laminated Porous Film and Non-Aqueous Electrolyte Secondary Battery In force · High confidence | In force | High confidence | |
| US 9,843,049 | Adhesive Resin Composition for Secondary Battery In force · High confidence | In force | High confidence | |
| US 10,665,838 | Method for Manufacturing Separator Web, Method for Manufacturing Separator, Separator Web, and Apparatus for Manufacturing Separator Web In force · High confidence | In force | High confidence |
Sources and methods
Compiled from the USPTO record, grants, published applications and recorded assignments, not yet reviewed by hand.
How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.