US2544059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Individual
•
Filing: 1947-04-11
•
Granted: 1951-03-06
•
Expires: 1967-04-11
Abstract
No abstract record available.
Inventors
- 👤 Bertram N Wickwire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:38
CPC Classifications
F; F21; F21V; F21V21/00; F21V21/08; F21V21/088; F21V21/0885; F21V33/00; F21V33/0004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1194986A
Cited
FR374308A
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US1172354A
Cited
US1226607A
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US1271390A
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US1947975A
Cited
US2009952A
Cited
FR862694A
Cited
US2299148A
Cited
US2361414A
Cited
US2373390A
Cited
US2424432A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-05 | 1954-09-04 | 1955-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-05 | 1958-09-04 | 1959-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-05 | 1962-09-04 | 1963-03-06 | $7700.00 | Window Closed / Lapsed |