Patent US3209641A successfully refreshed from Google Patents.
US3209641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infra-red transmitting fibers formed of arsenic and sulphur
Assignee: American Optical Corp
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Filing: 1960-02-15
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Granted: 1965-10-05
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Expires: 1980-02-15
Abstract
No abstract record available.
Inventors
- 👤 Lee O Upton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:08
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/01; C03B37/02; C03B37/022; C03B37/023; C03C; C03C13/00; C03C13/04; C03C13/041; C03C13/043; G; G02; G02B; G02B6/00; G02B6/10; G02B6/102; C03B2201/00; C03B2201/80; C03B2201/86; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/904; Y10S65/00; Y10S65/04; Y10S65/15
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A GLASS CLAD GLASS LIGHT-CONDUCTING FIBER ELEMENT PREDOMINATELY TRANSMISSIVE TO INFRA-RED RADIATION COMPRISING A CORE PART FORMED OF A GLASS HAVING A RELATIVELY HIGH INDEX OF REFRACTION CONSISTING OF APPROXIMATELY 60% ARSENIC AND APPROXIMATELY 40% SULPHUR AND A RELATIVELY THIN CLADDING OF GLASS ON SAID CORE PART HAVING A RELATIVELY LOW INDEX OF REFRACTION CONSISTING OF APPROXIMATELY 50% ARSENCI AND APPROXIMATELY 50% SULPHUR.
Claim 2
Dependent Claim
63 words
A GLASS CLAD GLASS LIGHT-CONDUCTING FIBER ELEMENT PREDOMINATELY TRANSMISSIVE TO INFRA-RED RADIATION COMPRISING A CORE PART FORMED OF A GLASS HAVING A RELATIVELY HIGH INDEX OF REFRACTION CONSISTING OF APPROXIMATELY 60% ARSENIC AND APPROXIMATELY 40% SULPHUR AND A RELATIVELY THIN CLADDING OF GLASS ON SAID CORE PART HAVING A RELATIVELY LOW INDEX OF REFRACTION CONSISTING OF APPROXIMATELY 50% ARSENCI AND APPROXIMATELY 50% SULPHUR.
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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) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |