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US2557182A
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Assignee: Individual
•
Filing: 1947-12-09
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Granted: 1951-06-19
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Expires: 1967-12-09
Abstract
No abstract record available.
Inventors
- 👤 Valmore J Forgett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:17
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/72; G03B27/727
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1973468A
Cited
US2133608A
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US2398842A
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US2399577A
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US2415568A
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US2430253A
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US2438303A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-18 | 1954-12-18 | 1955-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-18 | 1958-12-18 | 1959-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-18 | 1962-12-18 | 1963-06-19 | $7700.00 | Window Closed / Lapsed |