Patent US1950107A successfully refreshed from Google Patents.
US1950107A
Expired / Lapsed
US
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Pressure alleviator
Assignee: Individual
•
Filing: 1932-07-30
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Granted: 1934-03-06
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Expires: 1952-07-30
Abstract
No abstract record available.
Inventors
- 👤 Welford P Guinn
- 👤 William W Brooks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:36
CPC Classifications
F; F15; F15B; F15B1/00; F15B1/02; F15B1/04; F15B1/08; F15B1/10; F15B1/103; F04; F04B; F04B11/00; F04B11/0008; F04B11/0016; F04B11/0025; F15B2201/00; F15B2201/20; F15B2201/205; F15B2201/30; F15B2201/315; F15B2201/3153; F15B2201/40; F15B2201/41; F15B2201/411; F15B2201/415; F15B2201/4155; F15B2201/50; F15B2201/51
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) | 1937-03-05 | 1937-09-04 | 1938-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-03-05 | 1941-09-04 | 1942-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-03-05 | 1945-09-04 | 1946-03-06 | $7700.00 | Window Closed / Lapsed |