US3033701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infrared transmitting optical element
Assignee: Eastman Kodak Co
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Filing: 1957-05-20
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Granted: 1962-05-08
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Expires: 1977-05-20
Abstract
No abstract record available.
Inventors
- 👤 Raymond L Wozniak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:03
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/34; C03C17/36; C03C17/3602; C03C17/3605; C03C17/3618; C03C17/3621; C03C17/3649; C03C17/3657; C03C2217/00; C03C2217/70; C03C2217/78
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
THE METHOD OF COATING LOW INDEX OPTICAL INTERFERENCE LAYERS ONTO AN ELEMENT OF ARSENIC GLASS SELECTED FROM THE GROUP CONSISTING OF ARSENIC TRISULFIDE, ARSENIC TRISELENIDE AND ARSENIC TRISLENIDE ALLOYED WITH LESS THAN 35% ARSENIC METAL COMPRISING PLACING THE ELEMENT IN A VACUUM CHAMBER; CLEANING SAID ELEMENT WITH A BRIGHT GLOW DISCHARGE BOMBARMENT PRODUCED BY A POTENTIAL EXCEEDING 1500 VOLTS FOR A PERIOD OF TIME EXCEEDING TWO MINUNTES, EVAPORATING METALLIC GERMANIUM ONTO THE ELEMENT AT A PRESSURE BETWEEN .02 AND .1 MICRON HG AND THEN EVAPORATING AN OPTICAL INTERFERENCE LAYER OF SILICON MONOXIDE ONTO THE GERMANIUM.
Claim 2
Independent Claim
95 words
THE METHOD OF COATING LOW INDEX OPTICAL INTERFERENCE LAYERS ONTO AN ELEMENT OF ARSENIC GLASS SELECTED FROM THE GROUP CONSISTING OF ARSENIC TRISULFIDE, ARSENIC TRISELENIDE AND ARSENIC TRISLENIDE ALLOYED WITH LESS THAN 35% ARSENIC METAL COMPRISING PLACING THE ELEMENT IN A VACUUM CHAMBER; CLEANING SAID ELEMENT WITH A BRIGHT GLOW DISCHARGE BOMBARMENT PRODUCED BY A POTENTIAL EXCEEDING 1500 VOLTS FOR A PERIOD OF TIME EXCEEDING TWO MINUNTES, EVAPORATING METALLIC GERMANIUM ONTO THE ELEMENT AT A PRESSURE BETWEEN .02 AND .1 MICRON HG AND THEN EVAPORATING AN OPTICAL INTERFERENCE LAYER OF SILICON MONOXIDE ONTO THE GERMANIUM.
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) | 1965-05-07 | 1965-11-06 | 1966-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-07 | 1969-11-06 | 1970-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-07 | 1973-11-06 | 1974-05-08 | $7700.00 | Window Closed / Lapsed |