US2870987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gate valve and sealing means therefor
Assignee: Individual
•
Filing: 1955-07-08
•
Granted: 1959-01-27
•
Expires: 1975-07-08
Abstract
No abstract record available.
Inventors
- 👤 Dolphice H Greenwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:09
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/02; F16K3/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2704650A
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US1705800A
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US2224231A
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US2417494A
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US2401377A
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US2674436A
Cited
US2703103A
Cited
US2690360A
Cited
US2810542A
Cited
US2810543A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-26 | 1962-07-28 | 1963-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-26 | 1966-07-28 | 1967-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-26 | 1970-07-28 | 1971-01-27 | $7700.00 | Window Closed / Lapsed |