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US2542923A
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Assignee: Individual
•
Filing: 1947-06-16
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Granted: 1951-02-20
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Expires: 1967-06-16
Abstract
No abstract record available.
Inventors
- 👤 Hallen Alf Eskil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:22
CPC Classifications
B; B63; B63B; B63B27/00; B63B27/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US175095A
Cited
US298212A
Cited
US735371A
Cited
US788424A
Cited
US1233686A
Cited
US1221156A
Cited
US2220155A
Cited
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 |