US3711264A
Expired / Lapsed
US
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Method for producing a faraday rotation glass having a high verdet constant
Assignee: American Optical Corp
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Filing: 1971-03-08
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Granted: 1973-01-16
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Expires: 1991-03-08
Abstract
Abstract GLASS CONTAINING A SUBSTANTIAL AMOUNT OF CERIUM IN THE FORM OF CEROUS (CE+3) IONS IS PREPARED BY FUSING CERIC OXIDE AND DIBASIC AMMONIUM PHOSPHATE, WHICH REDUCES THE CERIC IONS TO CEROUS IONS, AND IN CERTAIN INSTANCES ANTIMONY OXIDE IS ADDED TO IMPROVE THE RATIO OF CEROUS TO CERIC IONS. REMELTING CERIUM GLASS IN ARGON ATMOSPHERE REDUCES ANY CERIC IONS TO CEROUS IONS, PROVIDING A CLEAR GLASS.
Inventors
- 👤 C Robinson
- 👤 R Graf
- 👤 R Young
- 👤 M Sproul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:08
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/12; C03C3/253; C03C3/16; C03C4/00; G; G02; G02F; G02F1/00; G02F1/0009; G02F1/0036; Y; Y10; Y10S; Y10S501/00; Y10S501/90
Claims Analysis
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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) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |