US2573984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cover and lock for toilet flush tanks
Assignee: Individual
•
Filing: 1948-05-10
•
Granted: 1951-11-06
•
Expires: 1968-05-10
Abstract
No abstract record available.
Inventors
- 👤 Parker Leo
- 👤 Clyde R Hopper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:54
CPC Classifications
E; E03; E03D; E03D1/00; E03D1/01; Y; Y10; Y10T; Y10T292/00; Y10T292/42; Y10T292/438
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US133370A
Cited
US1552720A
Cited
US1859003A
Cited
US1984403A
Cited
US2033629A
Cited
US2454267A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-05 | 1955-05-07 | 1955-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-05 | 1959-05-07 | 1959-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-05 | 1963-05-07 | 1963-11-06 | $7700.00 | Window Closed / Lapsed |