US3236595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnesium oxide infrared transmitting optical elements
Assignee: Eastman Kodak Co
•
Filing: 1961-10-02
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Granted: 1966-02-22
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Expires: 1981-10-02
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward Carnall
- 👤 Sherley E Hatch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:49
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/03; C04B35/04; C04B35/053; C04B35/622; C04B35/64; C04B35/645; G; G02; G02B; G02B1/00; G02B1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
AN ARTICLE OF MANUFACTURE WHICH TRANSMITS IN THE VISIBLE AND INFRARED REGIONS OF THE ELECTROMAGNETIC SPECTRUM CONSISTING OF A HOMOGENEOUS SOLID OF POLYCRYSTALLINE MAGNESIUM OXIDE.
Claim 2
Dependent Claim
25 words
AN ARTICLE OF MANUFACTURE WHICH TRANSMITS IN THE VISIBLE AND INFRARED REGIONS OF THE ELECTROMAGNETIC SPECTRUM CONSISTING OF A HOMOGENEOUS SOLID OF POLYCRYSTALLINE MAGNESIUM OXIDE.
References Cited (Backward Citations)
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US2208185A
Cited
US2335325A
Cited
US2538959A
Cited
GB837023A
Cited
US3141782A
Cited
US3060000A
Cited
US3116155A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |