US2902250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drain valves
Assignee: —
•
Filing: —
•
Granted: 1959-09-01
•
Expires: 1976-09-01
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:08
CPC Classifications
F; F16; F16K; F16K47/00; F16K47/02; F16K5/00; F16K5/06; F16K5/0605
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US343327A
Cited
DE439381C
Cited
US645706A
Cited
US1011797A
Cited
US1859479A
Cited
US2106671A
Cited
US2262169A
Cited
US2248958A
Cited
US2788027A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |