US3241986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical infrared-transmitting glass compositions
Assignee: Servo Corp of America
•
Filing: 1962-02-28
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Granted: 1966-03-22
•
Expires: 1982-02-28
Abstract
No abstract record available.
Inventors
- 👤 Jr Joseph Jerger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:24
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/32; C03C3/321; G; G02; G02B; G02B6/00; G02B6/10; G02B6/102; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/904
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
AN OPTICAL, INFRARED-TRANSMITTING GLASS COMPOSITION FORMED OF A FUSED, VITREOUS, NON-CRYSTALLINE SUBSTANTIALLY QUATERNARY GLASS-FORMING MIXTURE CAPABLE OF BEING REWORKED AT AN ELEVATED SOFTENING TEMPERATURE WITHOUT DEVITRIFYING, SAID MIXTURE CONSISTING OF ARSENIC, SULFUR, SELENIUM AND TELLURIUM IN PERCENTAGES BY WEIGHT RANGING FROM ABOUT 5% TO 55% ARSENIC, ABOUT 10% TO 75% SULFUR, ABOUT 5% TO 80% SELENIUM, AND THE BALANCE BY WEIGHT CONSTITUTING TELLURIUM IN AN AMOUNT RANGING FROM 4% TO 45%, WHEREIN SAID AMOUNT OF TELLURIUM DOES NOT EXCEED THE AMOUNT AT WHICH DEVITREFICATION OF THE GLASS OCCURS AND WHEREIN FOR A TELLURIUM CONTENT OF AT LEAST ABOUT 35% BY WEIGHT THE SUM OF THE SULFUR AND SELENIUM CONTENTS IS AT LEAST ABOUT 20% BY WEIGHT AND THE ARSENIC CONTENT IS AT LEAST ABOUT 10% BY WEIGHT.
Claim 2
Dependent Claim
127 words
AN OPTICAL, INFRARED-TRANSMITTING GLASS COMPOSITION FORMED OF A FUSED, VITREOUS, NON-CRYSTALLINE SUBSTANTIALLY QUATERNARY GLASS-FORMING MIXTURE CAPABLE OF BEING REWORKED AT AN ELEVATED SOFTENING TEMPERATURE WITHOUT DEVITRIFYING, SAID MIXTURE CONSISTING OF ARSENIC, SULFUR, SELENIUM AND TELLURIUM IN PERCENTAGES BY WEIGHT RANGING FROM ABOUT 5% TO 55% ARSENIC, ABOUT 10% TO 75% SULFUR, ABOUT 5% TO 80% SELENIUM, AND THE BALANCE BY WEIGHT CONSTITUTING TELLURIUM IN AN AMOUNT RANGING FROM 4% TO 45%, WHEREIN SAID AMOUNT OF TELLURIUM DOES NOT EXCEED THE AMOUNT AT WHICH DEVITREFICATION OF THE GLASS OCCURS AND WHEREIN FOR A TELLURIUM CONTENT OF AT LEAST ABOUT 35% BY WEIGHT THE SUM OF THE SULFUR AND SELENIUM CONTENTS IS AT LEAST ABOUT 20% BY WEIGHT AND THE ARSENIC CONTENT IS AT LEAST ABOUT 10% BY WEIGHT.
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) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |