US2772686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve mechanism
Assignee: Berger Brothers Co
•
Filing: 1952-11-28
•
Granted: 1956-12-04
•
Expires: 1972-11-28
Abstract
No abstract record available.
Inventors
- 👤 Irving R Versoy
- 👤 Frederic D Moller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:24
CPC Classifications
B; B64; B64D; B64D13/00; B64D13/02; B64D13/04; F; F16; F16K; F16K17/00; F16K17/36; Y; Y10; Y10T; Y10T137/00; Y10T137/0753; Y10T137/0777; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7797
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US542702A
Cited
US1676084A
Cited
US2177063A
Cited
US2291101A
Cited
US2355881A
Cited
US2622609A
Cited
US2651316A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |