Patent US2692511A successfully refreshed from Google Patents.
US3558208A
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Optical compensating filter with selective radial absorption distribution
Assignee: RCA Corp
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Filing: 1969-03-27
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Granted: 1971-01-26
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Expires: 1989-03-27
Abstract
Abstract THERE IS DISCLOSED AN OPTICAL FILTER, PRIMARILY FOR USE WITHIN A LASER RECORDER, WHICH OPERATES TO SELECTIVELY ABSORB PORTIONS OF A LIGHT BEAM OF NONUNIFORM INTENSITY PASSING THERETHROUGH SO AS TO RESULT IN THE EMERGENCE THEREFROM OF A LIGHT BEAM OF UNIFORM INTENSITY.
Inventors
- 👤 Kenneth C Hudson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:45
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/09; G02B27/0927; B; B23; B23K; B23K26/00; B23K26/02; B23K26/06; B23K26/064; B23K26/0643; B23K26/0648; B23K26/0665; B23K26/08; B23K26/082; B23K26/0821; G01; G01D; G01D15/00; G01D15/14; G02B26/00; G02B26/08; G02B26/10; G02B26/12; G02B26/124; G02B5/00; G02B5/20; G02B5/205; G11; G11B; G11B7/00; G11B7/12; G11B7/135; G11B7/1381; G11B7/1392; G11B7/13922; H; H01; H01S; H01S3/00; H01S3/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |