US2039089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unloader valve
Assignee: Westinghouse Electric Corp
•
Filing: 1932-07-07
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Granted: 1936-04-28
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Expires: 1952-07-07
Abstract
No abstract record available.
Inventors
- 👤 Julius F Koch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:01
CPC Classifications
F; F04; F04B; F04B49/00; F04B49/22; F04B49/24; F04B39/00; F04B39/12; F04B39/128; F04B49/06; F25; F25B; F25B2600/00; F25B2600/02; F25B2600/026; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/8593; Y10T137/85978; Y10T137/86171
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) | 1939-04-28 | 1939-10-28 | 1940-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-04-28 | 1943-10-28 | 1944-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-04-28 | 1947-10-28 | 1948-04-28 | $7700.00 | Window Closed / Lapsed |