US3764444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass ceramic and process therefor
Assignee: OI Glass Inc
•
Filing: 1971-05-17
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Granted: 1973-10-09
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Expires: 1991-05-17
Abstract
Abstract THE INVENTION IS DIRECTED TO GLASS-CERAMIC ARTICLES HAVING A GLASS-CERAMIC MAIN BODY PORTION AND AT LEAST ONE INTEGRAL SURFACE PORTION WHICH DIFFERS FROM THE BODY PORTION. THE SURFACE PORTION IS EITHER A GLASS OR A GLASS CERAMIC HAVING A LOWER COEFFICIENT OF LINEAR EXPANSION THAN THE BODY PORTION. PROCESSES FOR MANUFACTURING THE GLASSCERAMIC ARTICLES ARE ALSO DISCLOSED.
Inventors
- 👤 G Simmons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:16
CPC Classifications
C; C03; C03C; C03C10/00; C03C10/0018; C03C10/0027; C03C21/00; C03C21/001; C03C21/002; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/31
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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |