US3474372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature-responsive switch having self-contained heater
Assignee: CROWELL DESIGNS Inc
•
Filing: 1967-02-16
•
Granted: 1969-10-21
•
Expires: 1987-02-16
Abstract
No abstract record available.
Inventors
- 👤 William R Davenport
- 👤 Elmer T Davenport
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:09
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/18; H01H35/183
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2248531A
Cited
US2354529A
Cited
US2403803A
Cited
US2463891A
Cited
US3213246A
Cited
US3335243A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |