Patent US1809915A successfully refreshed from Google Patents.
US1809915A
Expired / Lapsed
US
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Condenser
Assignee: Westinghouse Electric Corp
•
Filing: 1930-08-13
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Granted: 1931-06-16
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Expires: 1950-08-13
Abstract
No abstract record available.
Inventors
- 👤 John H Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:59
CPC Classifications
F; F28; F28B; F28B1/00; F28B1/02; F28F; F28F9/00; F28F9/02; F28F9/0229; F28F9/0236; F28F9/0241; F28D; F28D7/00; F28D7/16; F28F2275/00; F28F2275/20; Y; Y10; Y10S; Y10S165/00; Y10S165/051; Y10S165/052; Y10S165/053; Y10S165/057
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) | 1934-06-15 | 1934-12-15 | 1935-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-06-15 | 1938-12-15 | 1939-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-06-15 | 1942-12-15 | 1943-06-16 | $7700.00 | Window Closed / Lapsed |