US2834689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infrared transmitting medium and method of making same
Assignee: American Optical Corp
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Filing: 1955-04-28
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Granted: 1958-05-13
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Expires: 1975-04-28
Abstract
No abstract record available.
Inventors
- 👤 Jupnik Helen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:05
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/20; G02B5/22; G02B5/226; C; C03; C03C; C03C17/00; C03C17/34; C03C17/3411; C03C17/3429; C03C17/3447; C03C17/3452; C03C17/3464; C03C17/347; C03C17/3494; C03C3/00; C03C3/32; C03C3/321; Y; Y10; Y10S; Y10S65/00; Y10S65/15; Y10S65/16; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/26; Y10T428/261
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
AN INFRARED TRANSMITTING MEDIUM COMPRISING ARSENIC TRISULPHIDE GLASS HAVING A THIN LAYER OF THORIUM OXYFLUORIDE BONDED TO SAID ARSENIC TRISULPHIDE GLASS BY AN INTERMEDIATE LAYER OF A LEAD COMPOUND SELECTED FROM THE GROUP CONSISTING OF LEAD FLUORIDE, LEAD CHROMATE, LEAD SULPHIDE AND LEAD PHOSPHATE WHICH IS A FRACTION IN THICKNESS OF THE THORIUM OXYFLUORIDE LAYER.
Claim 2
Dependent Claim
55 words
AN INFRARED TRANSMITTING MEDIUM COMPRISING ARSENIC TRISULPHIDE GLASS HAVING A THIN LAYER OF THORIUM OXYFLUORIDE BONDED TO SAID ARSENIC TRISULPHIDE GLASS BY AN INTERMEDIATE LAYER OF A LEAD COMPOUND SELECTED FROM THE GROUP CONSISTING OF LEAD FLUORIDE, LEAD CHROMATE, LEAD SULPHIDE AND LEAD PHOSPHATE WHICH IS A FRACTION IN THICKNESS OF THE THORIUM OXYFLUORIDE LAYER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |