US2665877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure sealed valve
Assignee: EDWARD VALVES Inc
•
Filing: 1947-05-07
•
Granted: 1954-01-12
•
Expires: 1967-05-07
Abstract
No abstract record available.
Inventors
- 👤 Macgregor David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:08
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/06; F16K15/063; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7754; Y10T137/7837; Y10T137/785; Y10T137/7852; Y10T137/7853; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/7913; Y10T292/00; Y10T292/20; Y10T292/205
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US553390A
Cited
DE424431C
Cited
US1779322A
Cited
US2223699A
Cited
US2252488A
Cited
US2321597A
Cited
US2332406A
Cited
US2440027A
Cited
US2443187A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-11 | 1957-07-13 | 1958-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-11 | 1961-07-13 | 1962-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-11 | 1965-07-13 | 1966-01-12 | $7700.00 | Window Closed / Lapsed |