US3306833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a phototropic glass article
Assignee: Corning Glass Works
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Filing: 1963-03-08
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Granted: 1967-02-28
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Expires: 1983-03-08
Abstract
No abstract record available.
Inventors
- 👤 Thomas G O'leary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:11
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/20; G02B5/22; G02B5/23; C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/089; C03C3/091; C03C3/11; C03C4/00; C03C4/04; C03C4/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A METHOD OF MAKING A PHOTOROPIC GLASS BODY COMPRISING THE STEPS OF MELTING A GLASS-FORMING BATCH CONTAINING AT LEAST ONE HALOGEN IN THE INDICATED MINIMUM EFFECTIVE PROPORTION OF 0.2% CHLORINE, 0.1% BROMINE, AND 0.08% IODINE AND A MINIMUM OF SILVER IN THE INDICATED PROPORTION OF 0.2% IN A GLASS WHEREIN THE EFFECTIVE HALOGEN CONSISTS OF CHLORINE, 0.05% IN A GLASS CONTAINING AT LEAST 0.1% BROMINE BUT LESS THAN 0.08% IODINE, AND 0.03% IN A GLASS CONTAINING AT LEAST 0.08% IODINE, SIMULTANEOUSLY COOLING THE MELT BELOW THE TRANSFORMATION POINT THEREOF AND SHAPING A GLASS BODY THEREFROM, THEREAFTER IRRADIATING AT LEAST A PORTION OF SAID GLASS BODY WITH X-RAYS AND SUBJECTING SAID BODY TO A TEMPERATURE OF AT LEAST 400*C., BUT NOT OVER ABOUT 1000*C., FOR A TIME SUFFICIENT TO PRECIPITATE SUBMICROSCOPIC CRYSTALS OF RADIATION-SENSITIVE MATERIAL, AND FINALLY COOLING SAID BODY TO ROOM TEMPERATURE.
Claim 2
Independent Claim
142 words
A METHOD OF MAKING A PHOTOROPIC GLASS BODY COMPRISING THE STEPS OF MELTING A GLASS-FORMING BATCH CONTAINING AT LEAST ONE HALOGEN IN THE INDICATED MINIMUM EFFECTIVE PROPORTION OF 0.2% CHLORINE, 0.1% BROMINE, AND 0.08% IODINE AND A MINIMUM OF SILVER IN THE INDICATED PROPORTION OF 0.2% IN A GLASS WHEREIN THE EFFECTIVE HALOGEN CONSISTS OF CHLORINE, 0.05% IN A GLASS CONTAINING AT LEAST 0.1% BROMINE BUT LESS THAN 0.08% IODINE, AND 0.03% IN A GLASS CONTAINING AT LEAST 0.08% IODINE, SIMULTANEOUSLY COOLING THE MELT BELOW THE TRANSFORMATION POINT THEREOF AND SHAPING A GLASS BODY THEREFROM, THEREAFTER IRRADIATING AT LEAST A PORTION OF SAID GLASS BODY WITH X-RAYS AND SUBJECTING SAID BODY TO A TEMPERATURE OF AT LEAST 400*C., BUT NOT OVER ABOUT 1000*C., FOR A TIME SUFFICIENT TO PRECIPITATE SUBMICROSCOPIC CRYSTALS OF RADIATION-SENSITIVE MATERIAL, AND FINALLY COOLING SAID BODY TO ROOM TEMPERATURE.
References Cited (Backward Citations)
US2682134A
Cited
US3208860A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |