Patent US3574582A successfully refreshed from Google Patents.
US3574582A
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US
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Method for making fiber optical image-conducting devices embodying stray light-absorbing means
Assignee: American Optical Corp
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Filing: 1968-10-04
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Granted: 1971-04-13
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Expires: 1988-10-04
Abstract
Abstract METHOD OF MAKING FIBER OPTICAL IMAGE-CONDUCTING DEVICES EACH OF DIFFERENT THICKNESSES IN DIFFERENT PARTS CONSIDERED IN THE LONGITUDINAL DIRECTION THEREOF, AND INCLUDING THIN ELONGATED LIGHT-ABSORBING MEANS DISPERSED AND THE FIBER OPTICAL DEVICE AND EXTENDING LONGITUDINALLY FROM END-TO-END THEROF, SAID METHOD BEING SUCH AS TO FORM ABSORBING MEANS OF SUCH VARYING CONTROLLED STRAY LIGHT CHARACTERISTICS AS TO PROVIDE UNIFORM TRANSMISSION OF OPTICAL ENERGY THROUGH ALL PARTS OF THE IMAGE-CONDUCTING DEVICE FORMED THEREBY.
Inventors
- 👤 Walter P Siegmund
- 👤 Noble S Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:38
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/10; C03B37/14; C03B37/15; G; G02; G02B; G02B6/00; G02B6/04; G02B6/06; G02B6/08
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) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |