Patent US3716385A successfully refreshed from Google Patents.
US3716385A
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Optical glasses comprising aif3 having a varying partial dispersion
Assignee: Schott AG
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Filing: 1970-04-06
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Granted: 1973-02-13
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Expires: 1990-04-06
Abstract
Abstract OPTICAL, FLUORINE-CONTAINING BARIUM SILICATE OR BARIUM BOROSILICATE GLASSES HAVING A VARYING PARTIAL DISPERSION, CHARACTERIZED IN THAT THEY CONSIST ESSENTIALLY OF: WT. PERCENT SIO2 15-45 B2O3 0-15 SIO2+B2O3 30-47 BAO 25-56 BAF2 0-10 BAO+BAF2 35-56 ALF3 3-18
Inventors
- 👤 W Ritze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:03
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/11; C03C3/112; C03C3/115; C03C3/118; C03C3/062; C03C3/064; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/903
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |