Three patents currently held, every record listed here
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
2 more records may belong here and await a decision; they are not counted.
The next term ends in Mar 2034. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
0
Ending by 2030
Mar 2034
Next term end
3
Patent families
When these terms end
Each bar runs from grant to computed term end. 2017 to 2041.
US 9,846,107
Systems, Apparatuses and Methods for Analyzing Combustion Gases and Presenting Combustion Process Diagnostics
Mar 22, 2036
US 11,644,450
Differential Monitoring Systems for Carbon Dioxide Levels as Well as Methods of Monitoring Same
May 4, 2041
20222027203220372041
Every computed term in this portfolio is shown above.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 patents
Ranked by citations and family size, against patents of the same kind granted the same year. How we rank
Notable
Ends Mar 2034 · High confidence
Also notable
Ends May 2041 · High confidence
Also notable
Ends Mar 2036 · High confidence
Flue Plug
US D844,117
Granted 2019. Computed term ends 2034.
Differential Monitoring Systems for Carbon Dioxide Levels as Well as Methods of Monitoring Same
US 11,644,450
The newest of the three, granted 2023. It anchors the portfolio to 2041, later than anything else here.
Systems, Apparatuses and Methods for Analyzing Combustion Gases and Presenting Combustion Process Diagnostics
US 9,846,107
Granted 2017 and renewed at every maintenance window due so far. Protection runs to 2036.
Fee deadlines
No maintenance fee falls due on this company's record before Nov 10, 2027.
Recent changes
Nothing was recorded against this company's patents in the last 90 days.
Patents held now
Soonest term end first.
Showing 1 to 3 of 3
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US D844,117 | Flue Plug In force · High confidence | In force | High confidence | |
| US 9,846,107 | Systems, Apparatuses and Methods for Analyzing Combustion Gases and Presenting Combustion Process Diagnostics In force · High confidence | In force | High confidence | |
| US 11,644,450 | Differential Monitoring Systems for Carbon Dioxide Levels as Well as Methods of Monitoring Same In force · High confidence | In force | High confidence |
Also on record, not counted in the 3: 4 patents ended · 3 records of undetermined status. 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.