US2515939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Opacifiable photosensitive glasses
Assignee: Corning Glass Works
•
Filing: 1943-12-08
•
Granted: 1950-07-18
•
Expires: 1963-12-08
Abstract
No abstract record available.
Inventors
- 👤 Stookey Stanley Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:55
CPC Classifications
C; C03; C03C; C03C4/00; C03C4/04; C03C14/00; C03C14/006
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
97 words
AN ARTICLE COMPRISING A BODY OF IRRADIATED, SUBSTANTIALLY COLORLESS PHOTOSENSITIVE GLASS CONSISTING ESSENTIALLY OF A FLUORINE-CONTAINING, THERMALLY OPACIFIABLE, SILICATE GLASS CONTAINING, ON THE OXIDE BASIS BY WEIGHT, THE INDICATED PROPORTION OF A PHOTOSENSITIVE METAL SELECTED FROM THE GROUP CONSISTING OF 0.01% TO 0.03% OF GOLD COMPUTED AS AU, 0.05% TO 0.3% OF SILVER COMPUTED AS AGC1 AND 0.1% TO 1% OF COPPER COMPUTED AS CU2O, 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, COLORED IMAGE EXHIBITING PHOTOGRAPHIC DETAIL.
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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 |