US2913350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorptive glasses and method of making same
Assignee: American Optical Corp
•
Filing: 1956-02-06
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Granted: 1959-11-17
•
Expires: 1976-02-06
Abstract
No abstract record available.
Inventors
- 👤 Lee O Upton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:26
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/12; C03C3/16; C03C3/17
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
58 words
LIGHT ABSORPTIVE MEANXS OF THE CHARACTER DESCRIBED COMPRISING GLASS FORMED TO DIFFERNET CONTROLLED SHADES RANGING FROM A GIVEN LIGHT SHADE TO A GIVEN DARK SHADE AND ALL OF WHICH HAVE A CHEMICAL ANALYSES INCLUDING P2O5 FROM APPROXIMATELY 65.50% TO 75.60%, AL2O3 FROM APPROXIMATELY 17.18% TO 20.30%, MOO2 FROM APPROXIMATELY 2.62% TO 10.30% AND CUO FROM APPROXIMATELY 1.1,% TO6.34%.
Claim 2
Dependent Claim
58 words
LIGHT ABSORPTIVE MEANXS OF THE CHARACTER DESCRIBED COMPRISING GLASS FORMED TO DIFFERNET CONTROLLED SHADES RANGING FROM A GIVEN LIGHT SHADE TO A GIVEN DARK SHADE AND ALL OF WHICH HAVE A CHEMICAL ANALYSES INCLUDING P2O5 FROM APPROXIMATELY 65.50% TO 75.60%, AL2O3 FROM APPROXIMATELY 17.18% TO 20.30%, MOO2 FROM APPROXIMATELY 2.62% TO 10.30% AND CUO FROM APPROXIMATELY 1.1,% TO6.34%.
Claim 3
Dependent Claim
37 words
LIGHT-ABSORBING MEANS AS SET FORTH IN CLAIM 1 HAVING A THIN COATING OF GOLD ON A SIDE SURFACE THEREOF OF A THICKNESS SUCH AS TO INCREASE THE SHADE NUMBER OF THE LIGHT-ABSORBING MEANS BY APPROXIMATELY 1.5 SHADE.
References Cited (Backward Citations)
US1749823A
Cited
US1961603A
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US2359789A
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US2434281A
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US2390191A
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US2608490A
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US2753271A
Cited
GB736073A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-16 | 1963-05-18 | 1963-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-16 | 1967-05-18 | 1967-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-16 | 1971-05-18 | 1971-11-17 | $7700.00 | Window Closed / Lapsed |