Patent US2881450A successfully refreshed from Google Patents.
US2881450A
Expired / Lapsed
US
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System for the electrical control of flush tank operations
Assignee: Individual
•
Filing: 1958-03-13
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Granted: 1959-04-14
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Expires: 1978-03-13
Abstract
No abstract record available.
Inventors
- 👤 Elton H Tubbs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:19
CPC Classifications
E; E03; E03D; E03D5/00; E03D5/10; H; H01; H01H; H01H35/00; H01H35/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1342716A
Cited
US1709083A
Cited
US1683062A
Cited
US1908009A
Cited
US2738448A
Cited
US2717396A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-13 | 1962-10-13 | 1963-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-13 | 1966-10-13 | 1967-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-13 | 1970-10-13 | 1971-04-14 | $7700.00 | Window Closed / Lapsed |