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Patent US2542847A successfully refreshed from Google Patents.
US2542847A
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Assignee: Glenn L Martin Co
•
Filing: 1945-06-26
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Granted: 1951-02-20
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Expires: 1965-06-26
Abstract
No abstract record available.
Inventors
- 👤 William J Turnbull
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:57
CPC Classifications
B; B64; B64F; B64F1/00; B64F1/22; B64F1/221; B63; B63B; B63B35/00; B63B35/50; B63B35/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-19 | 1954-08-21 | 1955-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-19 | 1958-08-21 | 1959-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-19 | 1962-08-21 | 1963-02-20 | $7700.00 | Window Closed / Lapsed |