Patent US2421277A successfully refreshed from Google Patents.
US2421277A
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US
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Assignee: Individual
•
Filing: 1943-05-12
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Granted: 1947-05-27
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Expires: 1963-05-12
Abstract
No abstract record available.
Inventors
- 👤 Richard W Luce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:09
CPC Classifications
G; G09; G09F; G09F13/00; G09F13/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2310790A
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US1535985A
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US1858975A
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US1959090A
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US2036146A
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US2102975A
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GB456398A
Cited
US2119992A
Cited
US2054289A
Cited
US2143946A
Cited
US2167149A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-26 | 1950-11-25 | 1951-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-26 | 1954-11-25 | 1955-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-26 | 1958-11-25 | 1959-05-27 | $7700.00 | Window Closed / Lapsed |