Patent US3425442A successfully refreshed from Google Patents.
US3425442A
Expired / Lapsed
US
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Pressure regulator
Assignee: Elster American Meter Co LLC
•
Filing: 1965-11-24
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Granted: 1969-02-04
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Expires: 1985-11-24
Abstract
No abstract record available.
Inventors
- 👤 Dwight N Johnson
- 👤 Albert R Cameron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:54
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/04; G05D16/06; G05D16/063; G05D16/0675; G05D16/0683; G05D16/0688; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7797; Y10T137/7798; Y10T137/7822; Y10T137/783
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE8602C
Cited
US2732853A
Cited
US862867A
Cited
GB172335A
Cited
FR1133926A
Cited
US3207175A
Cited
US3276470A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |