US2775981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pressure regulator
Assignee: Individual
•
Filing: 1954-04-26
•
Granted: 1957-01-01
•
Expires: 1974-04-26
Abstract
No abstract record available.
Inventors
- 👤 Lawrence C Zonker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:15
CPC Classifications
F; F02; F02M; F02M21/00; F02B; F02B43/00; F02M2700/00; F02M2700/12; F02M2700/126; Y; Y10; Y10S; Y10S261/00; Y10S261/68; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7795; Y10T137/7822; Y10T137/783
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1860046A
Cited
US2073299A
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US2073276A
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US2073298A
Cited
US2240846A
Cited
FR885627A
Cited
FR870918A
Cited
US2338760A
Cited
US2636814A
Cited
US2587165A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-01 | 1960-07-02 | 1961-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-01 | 1964-07-02 | 1965-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-01 | 1968-07-02 | 1969-01-01 | $7700.00 | Window Closed / Lapsed |