Patent US3459166A successfully refreshed from Google Patents.
US3459166A
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US
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Valve spring retainer and valve stem oil shield assembly and method of assembly
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1967-08-18
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Granted: 1969-08-05
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Expires: 1987-08-18
Abstract
No abstract record available.
Inventors
- 👤 Stanley H Updike
- 👤 William A Michaels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:54
CPC Classifications
F; F01; F01L; F01L3/00; F01L3/10; F01L3/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2753008A
Cited
US2822796A
Cited
US3110298A
Cited
US3171659A
Cited
US3369819A
Cited
US3333578A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-04 | 1973-02-03 | 1973-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-04 | 1977-02-03 | 1977-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-04 | 1981-02-03 | 1981-08-05 | $7700.00 | Window Closed / Lapsed |