US3589918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical glass and process for its manufacture
Assignee: Schott AG
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Filing: 1968-11-01
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Granted: 1971-06-29
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Expires: 1988-11-01
Abstract
Abstract OPTICAL GLASS COMPOSITIONS COMPRISING 25 TO 65 WT. PERCENT SIO2, 4-35 WT. PERCENT K2O, 4-45 WT. PERCENT TIO2 AND 3-45 WT. PERCENT SB2O3, CHARACTERIZED IN THAT THE MINIMUM CONTENT OF TIO2 PLUS SB2O3 AMOUNTS TO 18 WT. PERCENT.
Inventors
- 👤 Walter Jahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:51
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/062; C03C3/076; C03C3/083; C03C3/089; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/903
Claims Analysis
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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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |