Patent FR2468043A1 successfully refreshed from Google Patents.
Patent US4074990B1 successfully refreshed from Google Patents.
US4074990B1
Expired / Lapsed
US
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Method of preparing colemanite-containing glass batch
Assignee: PPG Industries Inc
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Filing: 1976-11-08
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Granted: 1983-08-09
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Expires: 1996-11-08
Abstract
No abstract record available.
Inventors
- 👤 Stanley F Brzozowski
- 👤 Joseph E Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:50
CPC Classifications
C; C03; C03B; C03B1/00; C03B1/02; C03C; C03C13/00; Y; Y02; Y02P; Y02P40/00; Y02P40/50
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) | 1986-08-08 | 1987-02-07 | 1987-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-08 | 1991-02-07 | 1991-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-08 | 1995-02-07 | 1995-08-09 | $7700.00 | Window Closed / Lapsed |