Patent US3303308A successfully refreshed from Google Patents.
US3303308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire detection thermostat
Assignee: Individual
•
Filing: 1964-01-20
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Granted: 1967-02-07
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Expires: 1984-01-20
Abstract
No abstract record available.
Inventors
- 👤 Philip J Koopman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:04
CPC Classifications
G; G08; G08B; G08B17/00; G08B17/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A THERMOSTAT FOR DETECTING A PREDETERMINED TEMPERATURE RISE COMPRISING A HOLLOW CONTAINER HAVING AIR THEREWITHIN, A NORMALLY OPEN VENT WITHIN SAID CONTAINER, A CHANNEL ADJACENT SAID VENT, A PAIR OF NORMALLY OPEN CONTACTS WITHIN SAID CONTAINER, SAID CONTACTS BEING CLOSEABLE BY EXPANSION OF SAID AIR WHEN SAID VENT IS CLOSED, A STOPPER NORMALLY CLEAR OF AND SPACED FROM SAID VENT, A NORMALLY U-SHAPED ACTUATOR SECURED TO SAID STOPPER, A CAP,
Claim 2
Dependent Claim
70 words
A THERMOSTAT FOR DETECTING A PREDETERMINED TEMPERATURE RISE COMPRISING A HOLLOW CONTAINER HAVING AIR THEREWITHIN, A NORMALLY OPEN VENT WITHIN SAID CONTAINER, A CHANNEL ADJACENT SAID VENT, A PAIR OF NORMALLY OPEN CONTACTS WITHIN SAID CONTAINER, SAID CONTACTS BEING CLOSEABLE BY EXPANSION OF SAID AIR WHEN SAID VENT IS CLOSED, A STOPPER NORMALLY CLEAR OF AND SPACED FROM SAID VENT, A NORMALLY U-SHAPED ACTUATOR SECURED TO SAID STOPPER, A CAP,
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |