US1878427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas burning heater
Assignee: Individual
•
Filing: 1927-08-31
•
Granted: 1932-09-20
•
Expires: 1947-08-31
Abstract
No abstract record available.
Inventors
- 👤 Thomas A Ronstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:23
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/02; F23D14/04; F23D14/08; F23D14/46; F23D14/62; F23D14/64
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) | 1935-09-20 | 1936-03-21 | 1936-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-09-20 | 1940-03-21 | 1940-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-09-20 | 1944-03-21 | 1944-09-20 | $7700.00 | Window Closed / Lapsed |