US2436419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic valve-actuating mechanism
Assignee: Individual
•
Filing: 1943-11-27
•
Granted: 1948-02-24
•
Expires: 1963-11-27
Abstract
No abstract record available.
Inventors
- 👤 Horace A Cartwright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:31
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/12; E01C19/16; E01C19/17; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7758; Y10T137/7759; Y10T137/8593; Y10T137/86903
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US327525A
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US607265A
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US1319154A
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US1551407A
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US1203538A
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US2044039A
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US2086268A
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US2278819A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-02-23 | 1951-08-25 | 1952-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-02-23 | 1955-08-25 | 1956-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-02-23 | 1959-08-25 | 1960-02-24 | $7700.00 | Window Closed / Lapsed |