US3216836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical crown glass
Assignee: Schott AG
•
Filing: 1960-08-19
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Granted: 1965-11-09
•
Expires: 1980-08-19
Abstract
No abstract record available.
Inventors
- 👤 Jahn Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:26
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/12; C03C3/16; C03C3/19; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/903
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
OPTICAL CROWN GLASS CONSISTING ESSENTIALLY OF 16 TO 36% BY WEIGHT OF BORO-ORTHOPHOSPHATE, 30 TO 77% BY WEIGHT OF BARIUM PYROPHOSPHATE AND 2 TO 35% BY WEIGHT OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF CADMIUM OXIDE, ALUMINUM OXIDE AND SODIUM OXIDE.
Claim 2
Dependent Claim
43 words
OPTICAL CROWN GLASS CONSISTING ESSENTIALLY OF 16 TO 36% BY WEIGHT OF BORO-ORTHOPHOSPHATE, 30 TO 77% BY WEIGHT OF BARIUM PYROPHOSPHATE AND 2 TO 35% BY WEIGHT OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF CADMIUM OXIDE, ALUMINUM OXIDE AND SODIUM OXIDE.
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) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |