Patent US3258589A successfully refreshed from Google Patents.
Patent US2499738A successfully refreshed from Google Patents.
US2499738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gate valve
Assignee: Individual
•
Filing: 1946-01-30
•
Granted: 1950-03-07
•
Expires: 1966-01-30
Abstract
No abstract record available.
Inventors
- 👤 Rolfe A Folsom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:00
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/02; F16K3/0218; E; E02; E02B; E02B13/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE379166C
Cited
US1564598A
Cited
US671958A
Cited
US1832724A
Cited
US1802199A
Cited
US2074607A
Cited
US2074502A
Cited
US2129758A
Cited
US2148726A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-06 | 1953-09-05 | 1954-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-06 | 1957-09-05 | 1958-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-06 | 1961-09-05 | 1962-03-07 | $7700.00 | Window Closed / Lapsed |