US1687641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid-pressure tank
Assignee: Westinghouse Electric Corp
•
Filing: 1921-02-26
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Granted: 1928-10-16
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Expires: 1941-02-26
Abstract
No abstract record available.
Inventors
- 👤 Aalborg Christian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:01
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/02; H01H33/53; H01H33/55; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7771; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/8593; Y10T137/86187
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) | 1931-10-16 | 1932-04-16 | 1932-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-10-16 | 1936-04-16 | 1936-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-10-16 | 1940-04-16 | 1940-10-16 | $7700.00 | Window Closed / Lapsed |