Patent US3676097A successfully refreshed from Google Patents.
US3676097A
Expired / Lapsed
US
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Physically strengthening bodies made of at least partly vitreous material
Assignee: AGC Glass Europe SA
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Filing: 1968-04-26
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Granted: 1972-07-11
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Expires: 1988-04-26
Abstract
Abstract A PROCESS FOR PHYSICALLY STRENGTHENING A BODY MADE OF VITREOUS OR PARTLY VITREOUS MATERIAL BY PROVIDING THE BODY WITH SURFACE LAYERS OR COATINGS OF A MATERIAL WHOSE COMPOSITION IS SUCH THAT AT LEAST ONE COATING INGREDIENT CAN UNDERGO A SOLID-TO-SOLID PHASE TRANSFORMATION WHICH GIVES THE COATING A HARDNESS AT LEAST EQUAL TO THAT OF THE BODY, AND CAUSING SUCH PHASE TRANSFORMATION TO TAKE PLACE.
Inventors
- 👤 Emile Plumat
- 👤 Robert Van Laethem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:34
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |