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US2829555A
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Polarimetric method and apparatus
Assignee: Individual
•
Filing: 1951-08-06
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Granted: 1958-04-08
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Expires: 1971-08-06
Abstract
No abstract record available.
Inventors
- 👤 Albert S Keston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:47
CPC Classifications
G; G01; G01J; G01J4/00; G01J4/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR501330A
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FR23617E
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US1977359A
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DE656389C
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US2078181A
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US2244362A
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GB540876A
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US2351539A
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US2450761A
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US2503808A
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US2509068A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-07 | 1961-10-07 | 1962-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-07 | 1965-10-07 | 1966-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-07 | 1969-10-07 | 1970-04-08 | $7700.00 | Window Closed / Lapsed |