Patent US4529157A successfully refreshed from Google Patents.
US3402913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve assembly for engine
Assignee: Dresser Industries Inc
•
Filing: 1966-06-27
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Granted: 1968-09-24
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Expires: 1986-06-27
Abstract
No abstract record available.
Inventors
- 👤 William H Payne
- 👤 Ralph E Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:15
CPC Classifications
F; F01; F01L; F01L3/00; F01L3/08; F01L3/085
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1704513A
Cited
US2516247A
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US2830784A
Cited
US2804086A
Cited
US3150562A
Cited
US3054384A
Cited
US3171328A
Cited
US3235085A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-24 | 1972-03-25 | 1972-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-24 | 1976-03-25 | 1976-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-24 | 1980-03-25 | 1980-09-24 | $7700.00 | Window Closed / Lapsed |