US2898930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure regulator
Assignee: Weatherhead Co
•
Filing: 1956-07-05
•
Granted: 1959-08-11
•
Expires: 1976-07-05
Abstract
No abstract record available.
Inventors
- 👤 Clair Theodore A St
- 👤 Richard C Krall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:53
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/04; G05D16/06; G05D16/063; G05D16/0675; G05D16/0694; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2607; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7822; Y10T137/7823; Y10T137/7826; Y10T137/7827; Y10T137/783
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2306746A
Cited
US2445359A
Cited
US2436522A
Cited
US2543203A
Cited
US2582974A
Cited
US2729236A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |