US2899322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical glass
Assignee: —
•
Filing: —
•
Granted: 1959-08-11
•
Expires: 1976-08-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:13
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/12; C03C3/14; C03C3/15; C03C3/155; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/903
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
COLOR POOR OPTICAL GLASS WHICH CONSIST ESSENTIALLY OF BORON TRIOXIDE, LATHANUM OXIDE, ZIRCONIUM OXIDE, TANTALUM OXIDE, TOGETHER WITH AT LEAST ONE OXIDE SELECTED FROM THE GROUP CONSISTING OF ZINC AND CADMIUM IN WHICH IN THE MELTING CHARGE THE MOL RATIO OF BORON TRIOXIDE TO LANTHANUM OXIDE IS BETWEEN 2.5 AND 3.6, THE MOL RATIO OF THE OXIDE OF THE BI-VALENT ELEMENT TO LANTHANUM OXIDE IS BETWEEN 0.36 AND 0.9, THE MOL RATIO OF THE SUM OF THE OXIDES OF THE FOUR AND FIVE VALENT ELEMENTS TO LANTHANUM OXIDE IS BETWEEN 0.2 AND 0.45 AND IN WHICH THE SUM OF THE GIVEN RATIOS IS BETWEEN 3.3 AND 4.9.
Claim 2
Dependent Claim
107 words
COLOR POOR OPTICAL GLASS WHICH CONSIST ESSENTIALLY OF BORON TRIOXIDE, LATHANUM OXIDE, ZIRCONIUM OXIDE, TANTALUM OXIDE, TOGETHER WITH AT LEAST ONE OXIDE SELECTED FROM THE GROUP CONSISTING OF ZINC AND CADMIUM IN WHICH IN THE MELTING CHARGE THE MOL RATIO OF BORON TRIOXIDE TO LANTHANUM OXIDE IS BETWEEN 2.5 AND 3.6, THE MOL RATIO OF THE OXIDE OF THE BI-VALENT ELEMENT TO LANTHANUM OXIDE IS BETWEEN 0.36 AND 0.9, THE MOL RATIO OF THE SUM OF THE OXIDES OF THE FOUR AND FIVE VALENT ELEMENTS TO LANTHANUM OXIDE IS BETWEEN 0.2 AND 0.45 AND IN WHICH THE SUM OF THE GIVEN RATIOS IS BETWEEN 3.3 AND 4.9.
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) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |