US2515943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive glass article and composition and method for making it
Assignee: Corning Glass Works
•
Filing: 1949-01-07
•
Granted: 1950-07-18
•
Expires: 1969-01-07
Abstract
No abstract record available.
Inventors
- 👤 Stookey Stanley Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:33
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/11; C03C3/112; C03C3/115; C03C3/118; C03C4/00; C03C4/005; C03C4/04; Y; Y10; Y10S; Y10S359/00; Y10S359/90; Y10T; Y10T428/00; Y10T428/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
82 words
A CLEAR, TRANSPARENT PHOTOSENSITIVE GLASS COMPRISING ESSENTIALLY 55% TO 75% SIO2, 12% TO 18% OF AN ALKALI METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF NA2O, MIXTURES OF NA2O AND K2O AND MIXTURES OF NA2O AND LI2O, 2% TO 12% AL2O3, AT LEAST 0.001% BUT LESS THAN 0.01% OF GOLD COMPUTED AS AU, 0.005% TO 0.05% CEO2, AND 1.8% TO 2.4% OF ANALYTICALLY DETERMINED FLUORINE, THE GLASS BEING CAPABLE OF HEAT-DEVELOPED OPACIFICATION ONLY WHEN AND WHERE IT IS IRRADIATED WITH SHORT-WAVE RADIATIONS.
Claim 2
Dependent Claim
82 words
A CLEAR, TRANSPARENT PHOTOSENSITIVE GLASS COMPRISING ESSENTIALLY 55% TO 75% SIO2, 12% TO 18% OF AN ALKALI METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF NA2O, MIXTURES OF NA2O AND K2O AND MIXTURES OF NA2O AND LI2O, 2% TO 12% AL2O3, AT LEAST 0.001% BUT LESS THAN 0.01% OF GOLD COMPUTED AS AU, 0.005% TO 0.05% CEO2, AND 1.8% TO 2.4% OF ANALYTICALLY DETERMINED FLUORINE, THE GLASS BEING CAPABLE OF HEAT-DEVELOPED OPACIFICATION ONLY WHEN AND WHERE IT IS IRRADIATED WITH SHORT-WAVE RADIATIONS.
Claim 3
Dependent Claim
49 words
A CLEAR, TRANSPARENT PHOTOSENSITIVE GLASS WHICH CONTAINS APPROXIMATELY 70.2% SIO2, 16.7% NA2O, 10.2% AL2O3, 0.5% B2O3, 0.002% OF GOLD COMPUTED AS AU, 0.01% CEO2, 0.09% SB2O3, AND 2.27% OF ANALYTICALLY DETERMINED FLUORINE, THE GLASS BEING CAPABLE OF HEAT-DEVELOPED OPACIFICATION ONLY WHEN AND WHERE IT IS IRRADIATED WITH SHORT-WAVE RADIATIONS.
Claim 4
Dependent Claim
49 words
A CLEAR, TRANSPARENT PHOTOSENSITIVE GLASS WHICH CONTAINS APPROXIMATELY 70.2% SIO2, 16.7% NA2O, 10.2% AL2O3, 0.5% B2O3, 0.002% OF GOLD COMPUTED AS AU, 0.01% CEO2, 0.09% SB2O3, AND 2.27% OF ANALYTICALLY DETERMINED FLUORINE, THE GLASS BEING CAPABLE OF HEAT-DEVELOPED OPACIFICATION ONLY WHEN AND WHERE IT IS IRRADIATED WITH SHORT-WAVE RADIATIONS.
References Cited (Backward Citations)
US2049765A
Cited
US2326012A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-17 | 1954-01-16 | 1954-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-17 | 1958-01-16 | 1958-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-17 | 1962-01-16 | 1962-07-18 | $7700.00 | Window Closed / Lapsed |