US2444959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flush valve mechanism for tanks
Assignee: MANSFIELD SANITARY POTTERY Inc
•
Filing: 1944-03-31
•
Granted: 1948-07-13
•
Expires: 1964-03-31
Abstract
No abstract record available.
Inventors
- 👤 Smith Harry Ford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:23
CPC Classifications
E; E03; E03D; E03D1/00; E03D1/30; F; F16; F16K; F16K31/00; F16K31/12; F16K31/18; F16K31/20; F16K31/24; F16K31/26; F16K31/265
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US417356A
Cited
GB189817774A
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US1300001A
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US1348662A
Cited
US1606364A
Cited
US1620964A
Cited
US1889626A
Cited
US1895145A
Cited
US1983419A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-13 | 1952-01-12 | 1952-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-13 | 1956-01-12 | 1956-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-13 | 1960-01-12 | 1960-07-13 | $7700.00 | Window Closed / Lapsed |