Five patents currently held, every record listed here
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
The next term ends in Nov 2030. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
1
Ending by 2030
Nov 2030
Next term end
5
Patent families
When these terms end
Each bar runs from grant to computed term end. 2011 to 2044.
US 8,427,105
System and Method for Equalizing a Battery Pack During a Battery Pack Charging Process
Oct 28, 2031
US 10,422,824
System and method for efficient adaptive joint estimation of battery cell state-of-charge, resistance, and available energy
May 4, 2033
20182025203220392044
1 pending application: term is not computable until grant.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 patents
Ranked by citations and family size, against patents of the same kind granted the same year. How we rank
Notable
Ends Oct 2031 · High confidence
Also notable
Ends Nov 2030 · High confidence
Also notable
Ends May 2033 · High confidence
System and Method for Equalizing a Battery Pack During a Battery Pack Charging Process
US 8,427,105
The most cited patent in this portfolio, cited by 37 later US patents, top 25% of utility patents granted in 2013 in our data. Protection runs to 2031.
System and Method for Recursively Estimating Battery Cell Total Capacity
US 8,041,522
Renewed at every maintenance window since the 2011 grant; no more fees are due before its term ends in 2030.
System and method for efficient adaptive joint estimation of battery cell state-of-charge, resistance, and available energy
US 10,422,824
Granted 2019. Computed term ends 2033.
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 Mar 24, 2027The maintenance fee for System and method for efficient adaptive joint estimation of battery cell state-of-charge, resistance, and available energy (US 10,422,824) comes due Mar 24, 2027. Unpaid by Sep 24, 2027, it lapses early.
Recent changes
Nothing was recorded against this company's patents in the last 90 days.
What they patent
The 1 largest of its 5 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Extensible and Dynamically Updated Energy Management System | 1 in force | to May 2044 |
Patents held now
Soonest term end first.
Showing 1 to 5 of 5
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 8,041,522 | System and Method for Recursively Estimating Battery Cell Total Capacity In force (reinstated) · High confidence | In force (reinstated) | High confidence | |
| US 8,427,105 | System and Method for Equalizing a Battery Pack During a Battery Pack Charging Process In force (reinstated) · High confidence | In force (reinstated) | High confidence | |
| US 10,422,824 | System and method for efficient adaptive joint estimation of battery cell state-of-charge, resistance, and available energy In force (reinstated) · High confidence | In force (reinstated) | High confidence | |
| US 8,918,299 | System and Method for Maximizing a Battery Pack Total Energy Metric In force · High confidence | In force | High confidence | |
| US 12,149,075 | Extensible and Dynamically Updated Energy Management System In force · High confidence | In force | High confidence |
Also on record, not counted in the 5: 1 application pending. 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.
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.