Patent US1222999A successfully refreshed from Google Patents.
US3168388A
Expired / Lapsed
US
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Apparatus for producing glass fibers
Assignee: PPG Industries Inc
•
Filing: 1962-09-07
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Granted: 1965-02-02
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Expires: 1982-09-07
Abstract
No abstract record available.
Inventors
- 👤 Earl T Martin
- 👤 Robert F Theobald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:41
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/01; C03B37/02; C03B37/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2147253A
Cited
US2763100A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-02 | 1968-08-03 | 1969-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-02 | 1972-08-03 | 1973-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-02 | 1976-08-03 | 1977-02-02 | $7700.00 | Window Closed / Lapsed |