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US2764055A
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US
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Interferometer light system
Assignee: Individual
•
Filing: 1953-03-03
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Granted: 1956-09-25
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Expires: 1973-03-03
Abstract
No abstract record available.
Inventors
- 👤 John E Clemens
- 👤 Ben B Johnstone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:55
CPC Classifications
G; G01; G01B; G01B9/00; G01B9/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1826812A
Cited
GB367859A
Cited
US2256804A
Cited
US2424976A
Cited
US2341422A
Cited
GB555672A
Cited
US2641963A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |