US2508729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automobile water circulating heater
Assignee: Individual
•
Filing: 1948-05-05
•
Granted: 1950-05-23
•
Expires: 1968-05-05
Abstract
No abstract record available.
Inventors
- 👤 Stein Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:34
CPC Classifications
F; F28; F28D; F28D1/00; F28D1/02; F28D1/04; F28D1/053; B; B60; B60H; B60H1/00; B60H1/02; B60H1/04; B60H1/08; F28D2001/0253; F28D2001/026; F28D2001/0273; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/40; Y10S165/401; Y10S165/416
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1953-05-22 | 1953-11-21 | 1954-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-22 | 1957-11-21 | 1958-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-22 | 1961-11-21 | 1962-05-23 | $7700.00 | Window Closed / Lapsed |