US1837905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiator
Assignee: Hart & Hutchinson Co
•
Filing: 1928-01-03
•
Granted: 1931-12-22
•
Expires: 1948-01-03
Abstract
No abstract record available.
Inventors
- 👤 Maxwell S Hart
- 👤 Maurice G Steele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:06
CPC Classifications
F; F24; F24D; F24D3/00; F24D3/12; F24D3/14; F24D3/145; F28; F28D; F28D1/00; F28D1/02; F28D1/04; F28D1/053; F28D1/05316; F28D1/05333; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/34; Y; Y02; Y02B; Y02B30/00
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) | 1934-12-21 | 1935-06-22 | 1935-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-12-21 | 1939-06-22 | 1939-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-12-21 | 1943-06-22 | 1943-12-22 | $7700.00 | Window Closed / Lapsed |