US1558848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heater
Assignee: DOBLE LAB
•
Filing: 1922-03-13
•
Granted: 1925-10-27
•
Expires: 1942-03-13
Abstract
No abstract record available.
Inventors
- 👤 Jr William A Doble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:32
CPC Classifications
F; F24; F24H; F24H9/00; F24H9/20; F24H9/2064; F24H9/2085; F24H3/00; F24H3/02; F24H3/06
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) | 1928-10-26 | 1929-04-27 | 1929-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-10-26 | 1933-04-27 | 1933-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-10-26 | 1937-04-27 | 1937-10-27 | $7700.00 | Window Closed / Lapsed |