US3247392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical coating and assembly used as a band pass interference filter reflecting in the ultraviolet and infrared
Assignee: Optical Coating Laboratory Inc
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Filing: 1961-05-17
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Granted: 1966-04-19
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Expires: 1981-05-17
Abstract
No abstract record available.
Inventors
- 👤 Alfred J Thelen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:31
CPC Classifications
H; H10; H10F; H10F77/00; H10F77/30; H10F77/306; H10F77/311; H10F77/315; C; C03; C03C; C03C17/00; C03C17/34; C03C17/3411; C03C17/3429; C03C17/3447; C03C17/3452; G; G02; G02B; G02B5/00; G02B5/20; G02B5/28; G02B5/281; G02B5/282; G02B5/285; Y; Y02; Y02E; Y02E10/00; Y02E10/50
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
114 words
IN AN ASSEMBLY OF THE CHARACTER DESCRIBED FOR A PREDETERMINED DESING WAVELENGTH, A PHOTOSENSITIVE DEVICE HAVING A PREDETERMINED SPECTRAL RESPONSE, A COVER OF TRANSPARENT MATERIAL MOUNTED OVER THE PHOTOSENSITIVE DEVICE, AND AN OPTICAL COATING DISPOSED ON THE COVER AND HAVING A BAND PASS SUBSTANTIALLY IDENTICAL TO THE SPECTRAL RESPONSE OF THE PHOTOSENSITIVE DEVICE, THE OPTICAL COATING COMPRISING A PLURALITY OF SUPERPOSED LAYERS DISPOSD ON ONE SURFACE OF THE COVER, THE LAYERS BEING FORMED OF THREE DIFFERENT MATERIALS A, B AND C, EACH OF THE MATERIALS HAVING A DIFFERENT INDEX OF REFRACTION, THE LAYERS BEING ARRANGED TO HAVE A PERIODICITY OF ABCBA AND EACH LAYER HAVING AN OPTICAL THICKNESS OF ONE-QUARTER OF THE DESIGN WAVELENGTH.
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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) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |