Patent US2063237A successfully refreshed from Google Patents.
Patent US3295944A successfully refreshed from Google Patents.
US3295944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for controlling the rate of devitrification
Assignee: OI Glass Inc
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Filing: 1963-01-02
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Granted: 1967-01-03
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Expires: 1983-01-02
Abstract
No abstract record available.
Inventors
- 👤 Nils Tryggve E A Baak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:30
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/14; H01M6/18; H01M6/20; C; C03; C03C; C03C10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A METHOD FOR MEASURING THE DEGREE OF DIVITRIFICATION OF THERMALLY CRYSTALLIZABLE VITREOUS SHAPED ARTICLES WHILE SAID ARTICLES ARE BEING SUBJECTED TO A HEAT TREATMENT IN THE DEVITRIFICATION TEMPERATURE RANGE OF SAID VITREOUS MATERIAL TO PRODUCE THERMALLY CRYSTALLIZED ARTICLES WHICH COMPRISES SUBJECTING A VOLTAGE CELL TO THE SAME HEAT TREATMENT AS THE VITREOUS ARTICLES UNDERGOING DEVITRIFICATION, SAID VOLTAGE CELL COMPRISING A PAIR OF PLATES WHEREIN ONE OF SAID PLATES IS FORMED FROM A CRYSTALLINE MATERIAL, THE OTHER OF SAID PLATES BEING FORMED FROM A THERMALLY CRYSTALLIZABLE VITREOUS MATERIAL HAVING THE SAME CHEMICAL COMPOSITION AS SAID VITREOUS ARTICLES UNDERGOING DEVITRIFICATION, MEASURING THE ELECTROMOTIVE FORCE PRODUCED BY SAID VOLTAGE CELL DURING SAID HEAT TREATMENT UNTIL THE DESIRED DEGREE OF DEVITRIFICATION IS REACHED WHICH CORRESPONDS TO A RECORDED VALUE OF ELECTROMOTIVE FORCE AND THEN REMOVING SAID VITREOUS ARTICLES FROM SAID HEAT TREATMENT, SAID ARTICLES HAVING REACHED THE DESIRED DEGREE OF DEVITRIFICATION.
Claim 2
Independent Claim
147 words
A METHOD FOR MEASURING THE DEGREE OF DIVITRIFICATION OF THERMALLY CRYSTALLIZABLE VITREOUS SHAPED ARTICLES WHILE SAID ARTICLES ARE BEING SUBJECTED TO A HEAT TREATMENT IN THE DEVITRIFICATION TEMPERATURE RANGE OF SAID VITREOUS MATERIAL TO PRODUCE THERMALLY CRYSTALLIZED ARTICLES WHICH COMPRISES SUBJECTING A VOLTAGE CELL TO THE SAME HEAT TREATMENT AS THE VITREOUS ARTICLES UNDERGOING DEVITRIFICATION, SAID VOLTAGE CELL COMPRISING A PAIR OF PLATES WHEREIN ONE OF SAID PLATES IS FORMED FROM A CRYSTALLINE MATERIAL, THE OTHER OF SAID PLATES BEING FORMED FROM A THERMALLY CRYSTALLIZABLE VITREOUS MATERIAL HAVING THE SAME CHEMICAL COMPOSITION AS SAID VITREOUS ARTICLES UNDERGOING DEVITRIFICATION, MEASURING THE ELECTROMOTIVE FORCE PRODUCED BY SAID VOLTAGE CELL DURING SAID HEAT TREATMENT UNTIL THE DESIRED DEGREE OF DEVITRIFICATION IS REACHED WHICH CORRESPONDS TO A RECORDED VALUE OF ELECTROMOTIVE FORCE AND THEN REMOVING SAID VITREOUS ARTICLES FROM SAID HEAT TREATMENT, SAID ARTICLES HAVING REACHED THE DESIRED DEGREE OF DEVITRIFICATION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |