US2515941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive opal glass
Assignee: Corning Glass Works
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Filing: 1946-09-09
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Granted: 1950-07-18
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Expires: 1966-09-09
Abstract
No abstract record available.
Inventors
- 👤 Stookey Stanley Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:55
CPC Classifications
C; C03; C03C; C03C4/00; C03C4/04; C03C3/00; C03C3/04; C03C3/076; C03C3/095
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
102 words
AN ARTICLE COMPRISING A BODY OF IRRADIATED SUBSTANTIALLY COLORLESS PHOTOSENSITIVE GLASS CONSISTING ESSENTIALLY OF A SILICATE GLASS CONTAINING, ON THE OXIDE BASIS BY WEIGHT, 50% TO 65% SIO2, 5% TO 15% OF AN ALKALI METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF NA2O, K2O, AND MIXTURES OF NA2O AND K2O, 15% TO 45% BAO, AND 0.004% TO 0.05% OF GOLD COMPUTED AS AU, SAID GLASS BODY CONTAINING WITHIN ITS MASS A PREDETERMINED LATENT PHOTOGRAPHIC IMAGE CAPABLE OF BEING DEVELOPED BY UNIFORM HEATING OF THE ENTIRE GLASS BODY, INTO A VISIBLE OPACIFIED IMAGE EXHIBITING PHOTOGRAPHIC DETAIL AND COMPRISING LIGHT-DIFFUSING CRYSTALLITES OF BARIUM DISILICATE.
References Cited (Backward Citations)
US2049765A
Cited
US2144943A
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US2237042A
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US2326012A
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US2422472A
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US2292684A
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 |