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US2452993A
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Assignee: Individual
•
Filing: 1944-10-23
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Granted: 1948-11-02
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Expires: 1964-10-23
Abstract
No abstract record available.
Inventors
- 👤 Calloway Gaither Dewitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:52
CPC Classifications
B; B26; B26B; B26B13/00; B26B13/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US397389A
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US565193A
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US802868A
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US1633441A
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US1862079A
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US1966044A
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US2076041A
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US2088224A
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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) | 1951-11-02 | 1952-05-03 | 1952-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-02 | 1956-05-03 | 1956-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-02 | 1960-05-03 | 1960-11-02 | $7700.00 | Window Closed / Lapsed |