Patent US2992028A successfully refreshed from Google Patents.
US2992028A
Expired / Lapsed
US
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Packed-off clearance and method of packing-off same
Assignee: Hydril LLC
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Filing: 1957-08-26
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Granted: 1961-07-11
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Expires: 1977-08-26
Abstract
No abstract record available.
Inventors
- 👤 Granville S Knox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:50
CPC Classifications
F; F16; F16K; F16K41/00; F16K41/02; F16K41/023; F16K41/026; Y; Y10; Y10S; Y10S277/00; Y10S277/904; Y10S277/924
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1056010A
Cited
US1558925A
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US1844903A
Cited
US2578523A
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US2586357A
Cited
US2685707A
Cited
US2731282A
Cited
US2770842A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |