Patent US5398949A successfully refreshed from Google Patents.
US1964256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heater
Assignee: Individual
•
Filing: 1932-03-14
•
Granted: 1934-06-26
•
Expires: 1952-03-14
Abstract
No abstract record available.
Inventors
- 👤 Frank A Fahrenwald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:33
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/22; F24H1/40; F24H1/41; Y; Y10; Y10S; Y10S165/00; Y10S165/051; Y10S165/052; Y10S165/063; Y10S165/065
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) | 1937-06-25 | 1937-12-25 | 1938-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-06-25 | 1941-12-25 | 1942-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-06-25 | 1945-12-25 | 1946-06-26 | $7700.00 | Window Closed / Lapsed |