US2543438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flush valve system
Assignee: Individual
•
Filing: 1949-01-13
•
Granted: 1951-02-27
•
Expires: 1969-01-13
Abstract
No abstract record available.
Inventors
- 👤 Francis R Cochran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:40
CPC Classifications
E; E03; E03D; E03D5/00; E03D5/02; E03D5/09; E03D5/092; E03D1/00; E03D1/30; E03D1/34
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-26 | 1954-08-28 | 1955-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-26 | 1958-08-28 | 1959-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-26 | 1962-08-28 | 1963-02-27 | $7700.00 | Window Closed / Lapsed |