US2000883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve
Assignee: ALFRED F PILLSBURY
•
Filing: 1932-03-07
•
Granted: 1935-05-07
•
Expires: 1952-03-07
Abstract
No abstract record available.
Inventors
- 👤 Harry E Cullen
- 👤 Henry O Ronning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:16
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/10; F04B39/1073; F04B39/0005; F04B39/0016; F16; F16K; F16K15/00; F16K15/14; F16K15/16; F16K15/161
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) | 1938-05-06 | 1938-11-05 | 1939-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-05-06 | 1942-11-05 | 1943-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-05-06 | 1946-11-05 | 1947-05-07 | $7700.00 | Window Closed / Lapsed |