Patent US1749310A successfully refreshed from Google Patents.
US1749310A
Expired / Lapsed
US
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Valve-operating device
Assignee: COFFIN VALVE Co
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Filing: 1924-07-25
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Granted: 1930-03-04
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Expires: 1944-07-25
Abstract
No abstract record available.
Inventors
- 👤 Donald M Belcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:51
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/04; F16K31/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1933-03-03 | 1933-09-02 | 1934-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-03-03 | 1937-09-02 | 1938-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-03-03 | 1941-09-02 | 1942-03-04 | $7700.00 | Window Closed / Lapsed |