Patent US2420964A successfully refreshed from Google Patents.
US2420964A
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US
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Assignee: Glenn L Martin Co
•
Filing: 1941-04-11
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Granted: 1947-05-20
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Expires: 1961-04-11
Abstract
No abstract record available.
Inventors
- 👤 Leslie T Miller
- 👤 Benjamin T Salmon
- 👤 Curt L Zitza
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:19
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR572155A
Cited
GB337871A
Cited
US1757783A
Cited
US2179894A
Cited
US2228637A
Cited
US2244594A
Cited
US2178297A
Cited
US2177642A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-19 | 1950-11-18 | 1951-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-19 | 1954-11-18 | 1955-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-19 | 1958-11-18 | 1959-05-20 | $7700.00 | Window Closed / Lapsed |