Patent US3898999A successfully refreshed from Google Patents.
US2554243A
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US
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Optical device for resolving, recombining, mixing, showing, and comparing light rays by means of dispersion prisms
Assignee: Individual
•
Filing: 1946-09-11
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Granted: 1951-05-22
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Expires: 1966-09-11
Abstract
No abstract record available.
Inventors
- 👤 Desirello Narciso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:01
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/10; G02B27/12; G02B27/126; G01; G01J; G01J3/00; G01J3/12; G02B27/1006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1840476A
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US1971737A
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US2077102A
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US2122689A
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US2206521A
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US2193606A
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US2339780A
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US2330877A
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US2443258A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-21 | 1954-11-20 | 1955-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-21 | 1958-11-20 | 1959-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-21 | 1962-11-20 | 1963-05-22 | $7700.00 | Window Closed / Lapsed |