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US2436757A
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Assignee: Individual
•
Filing: 1943-11-03
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Granted: 1948-02-24
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Expires: 1963-11-03
Abstract
No abstract record available.
Inventors
- 👤 Lewis William Hurst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:27
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/22; E01C19/23; E01C19/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US601440A
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US731588A
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US773480A
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US929762A
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US986290A
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US1076761A
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US1141295A
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US1156853A
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US1964542A
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US2042780A
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US2242454A
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US2333004A
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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 |