Patent US2724838A successfully refreshed from Google Patents.
US2724838A
Expired / Lapsed
US
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Dual flush control for toilets
Assignee: Individual
•
Filing: 1953-12-17
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Granted: 1955-11-29
•
Expires: 1973-12-17
Abstract
No abstract record available.
Inventors
- 👤 Wirth Dick
- 👤 Anderson Jack
- 👤 Crooks Milton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:35
CPC Classifications
E; E03; E03D; E03D1/00; E03D1/02; E03D1/14; E03D1/142; E03D1/144; Y; Y10; Y10S; Y10S4/00; Y10S4/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US945424A
Cited
US1890281A
Cited
US2001390A
Cited
US1992381A
Cited
US2532977A
Cited
US2674744A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-28 | 1959-05-30 | 1959-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-28 | 1963-05-30 | 1963-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-28 | 1967-05-30 | 1967-11-29 | $7700.00 | Window Closed / Lapsed |