Patent US1814010A successfully refreshed from Google Patents.
US1814010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air heater
Assignee: Diamond Power Specialty Corp
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Filing: 1925-02-27
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Granted: 1931-07-14
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Expires: 1945-02-27
Abstract
No abstract record available.
Inventors
- 👤 Norman L Snow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:49
CPC Classifications
F; F28; F28D; F28D7/00; F28D7/0066; F28D7/0075; F28F; F28F9/00; F28F9/02; F28F9/04; F28F9/06; Y; Y10; Y10S; Y10S165/00; Y10S165/051; Y10S165/052; Y10S165/053; Y10S165/058; Y10S165/059
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) | 1934-07-13 | 1935-01-12 | 1935-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-07-13 | 1939-01-12 | 1939-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-07-13 | 1943-01-12 | 1943-07-14 | $7700.00 | Window Closed / Lapsed |