Patent US2285442A successfully refreshed from Google Patents.
Patent US2844353A successfully refreshed from Google Patents.
US2844353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal for plug valves
Assignee: Individual
•
Filing: 1955-02-28
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Granted: 1958-07-22
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Expires: 1975-02-28
Abstract
No abstract record available.
Inventors
- 👤 Albert G Gurries
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:56
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/04; F16K5/0457; F16K5/0478
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
BE507140A
Cited
GB189511694A
Cited
US1872417A
Cited
US1947071A
Cited
US2366520A
Cited
US2505270A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |