US2550863A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve assembly
Assignee: ROBERTS PRESSURE VALVE CO Inc
•
Filing: 1946-08-13
•
Granted: 1951-05-01
•
Expires: 1966-08-13
Abstract
No abstract record available.
Inventors
- 👤 Zbislaw M Roehr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:58
CPC Classifications
B; B65; B65D; B65D83/00; B65D83/14; B65D83/44; B65D83/48; B65D83/16; B65D83/162
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US710674A
Cited
US1162834A
Cited
US987633A
Cited
US1503633A
Cited
US1568159A
Cited
US2222926A
Cited
US2372392A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |