US1448240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermostat
Assignee: SPENCER THERMOSTAT Co
•
Filing: 1921-04-08
•
Granted: 1923-03-13
•
Expires: 1941-04-08
Abstract
No abstract record available.
Inventors
- 👤 John A Spencer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:31
CPC Classifications
H; H01; H01H; H01H37/00; H01H37/02; H01H37/32; H01H37/52; H01H37/54; H01H2037/5463; Y; Y10; Y10S; Y10S200/00; Y10S200/28; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49105
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1926-03-12 | 1926-09-11 | 1927-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-03-12 | 1930-09-11 | 1931-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-03-12 | 1934-09-11 | 1935-03-13 | $7700.00 | Window Closed / Lapsed |