Patent US3814725A successfully refreshed from Google Patents.
US3814725A
Expired / Lapsed
US
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Polyalkylene terephthalate molding resin
Assignee: Celanese Corp
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Filing: 1973-06-26
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Granted: 1974-06-04
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Expires: 1993-06-26
Abstract
Abstract AN IMPROVED MOLDING RESIN COMPRISING A REINFORCING FILLER AND A POLYPROPYLENE TEREPHTHALATE OR A POLYBUTYLENE TEREPHTHALATE AND PROCESS FOR PRODUCING SAME.
Inventors
- 👤 D Zimmerman
- 👤 R Isaacson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:28
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/02
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) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |