Patent FR16777E successfully refreshed from Google Patents.
US3498730A
Expired / Lapsed
US
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Heat motor safety valve construction and parts therefor
Assignee: Robertshaw Controls Co
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Filing: 1967-12-07
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Granted: 1970-03-03
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Expires: 1987-12-07
Abstract
No abstract record available.
Inventors
- 👤 Denis G Wolfe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:38
CPC Classifications
F; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F02G1/053; F02G1/055; G; G05; G05D; G05D23/00; G05D23/01; G05D23/02; G05D23/08; F02G2270/00; F02G2270/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3213922A
Cited
US1842330A
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US1883242A
Cited
US1981934A
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US2163801A
Cited
US2758642A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-02 | 1973-09-01 | 1974-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-02 | 1977-09-01 | 1978-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-02 | 1981-09-01 | 1982-03-03 | $7700.00 | Window Closed / Lapsed |