Patent US3542052A successfully refreshed from Google Patents.
US3542052A
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US
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Relief monitor for gas service
Assignee: Fisher Governor Co
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Filing: 1968-08-05
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Granted: 1970-11-24
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Expires: 1988-08-05
Abstract
No abstract record available.
Inventors
- 👤 Donald W Irwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:23
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/04; G05D16/06; G05D16/063; G05D16/0675; G05D16/0683; F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/048; F16K17/20; F16K17/22; F16K17/32; F16K17/34; F16K31/00; F16K31/12; F16K31/36; F16K31/365; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2607; Y10T137/261; Y10T137/7722; Y10T137/7723; Y10T137/7728; Y10T137/7758; Y10T137/7762; Y10T137/7764; Y10T137/7781; Y10T137/7793; Y10T137/7794; Y10T137/8593; Y10T137/87917
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) | 1973-11-23 | 1974-05-25 | 1974-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-23 | 1978-05-25 | 1978-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-23 | 1982-05-25 | 1982-11-24 | $7700.00 | Window Closed / Lapsed |