US3390135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous polyester process
Assignee: PPG Industries Inc
•
Filing: 1967-04-25
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Granted: 1968-06-25
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Expires: 1987-04-25
Abstract
No abstract record available.
Inventors
- 👤 Jerome A Seiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:47
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/78; C08G63/785; C08F; C08F283/00; C08F283/01
Claims Analysis
Total Claims: 0
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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) | 1971-06-25 | 1971-12-25 | 1972-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-25 | 1975-12-25 | 1976-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-25 | 1979-12-25 | 1980-06-25 | $7700.00 | Window Closed / Lapsed |