US2771843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure regulator
Assignee: EARL A PETERMAN
•
Filing: 1951-12-13
•
Granted: 1956-11-27
•
Expires: 1971-12-13
Abstract
No abstract record available.
Inventors
- 👤 Gordon H Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:50
CPC Classifications
F; F04; F04D; F04D15/00; F04D15/0066
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US810666A
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US944255A
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US1006803A
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US1240531A
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US1190799A
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US1341696A
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US1415647A
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US1863406A
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US2535617A
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US2642805A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-27 | 1960-05-28 | 1960-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-27 | 1964-05-28 | 1964-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-27 | 1968-05-28 | 1968-11-27 | $7700.00 | Window Closed / Lapsed |