Patent US1083395A successfully refreshed from Google Patents.
US1083395A
Expired / Lapsed
US
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Air-heater.
Assignee: BF Sturtevant Co
•
Filing: 1909-02-02
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Granted: 1914-01-06
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Expires: 1929-02-02
Abstract
No abstract record available.
Inventors
- 👤 Ernest B Freeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:23
CPC Classifications
F; F28; F28D; F28D7/00; F28D7/02; F28D7/024; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/40; Y10S165/427; Y10S165/429; Y10S165/43
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) | 1917-01-05 | 1917-07-07 | 1918-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1921-01-05 | 1921-07-07 | 1922-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1925-01-05 | 1925-07-07 | 1926-01-06 | $7700.00 | Window Closed / Lapsed |