Patent US1680408A successfully refreshed from Google Patents.
US1680408A
Expired / Lapsed
US
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Condensation product and method of making the same
Assignee: Westinghouse Electric Corp
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Filing: 1922-02-23
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Granted: 1928-08-14
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Expires: 1942-02-23
Abstract
No abstract record available.
Inventors
- 👤 Arthur L Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:45
CPC Classifications
C; C08; C08L; C08L61/00; C08L61/04; C08L61/06; C08G; C08G16/00; C08G16/02; C08G16/0212; C08G16/0218; C08G16/0225; C08G8/00; C08G8/04; C08G8/08; C08G8/10
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) | 1931-08-14 | 1932-02-13 | 1932-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-08-14 | 1936-02-13 | 1936-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-08-14 | 1940-02-13 | 1940-08-14 | $7700.00 | Window Closed / Lapsed |