Patent US2816566A successfully refreshed from Google Patents.
US2816566A
Expired / Lapsed
US
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Shield or protector for a valve stem
Assignee: Individual
•
Filing: 1954-02-03
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Granted: 1957-12-17
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Expires: 1974-02-03
Abstract
No abstract record available.
Inventors
- 👤 Clarence C Warren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:31
CPC Classifications
F; F16; F16K; F16K27/00; F16K27/12; F16K27/08; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/7043; Y10T137/7062; Y10T74/00; Y10T74/21; Y10T74/219
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US266031A
Cited
US1291183A
Cited
US1266246A
Cited
US1692067A
Cited
US2665875A
Cited
US2578630A
Cited
US2738684A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-16 | 1961-06-17 | 1961-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-16 | 1965-06-17 | 1965-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-16 | 1969-06-17 | 1969-12-17 | $7700.00 | Window Closed / Lapsed |