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US1673953A
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Viscosity-compensating device
Assignee: Westinghouse Electric Corp
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Filing: 1925-10-02
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Granted: 1928-06-19
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Expires: 1945-10-02
Abstract
No abstract record available.
Inventors
- 👤 Henry F Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:59
CPC Classifications
F; F15; F15B; F15B21/00; F15B21/04; F15B21/045
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) | 1931-06-19 | 1931-12-19 | 1932-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-06-19 | 1935-12-19 | 1936-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-06-19 | 1939-12-19 | 1940-06-19 | $7700.00 | Window Closed / Lapsed |