US3696071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of polyethylene terephthalate
Assignee: Honeywell International Inc
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Filing: 1970-07-30
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Granted: 1972-10-03
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Expires: 1990-07-30
Abstract
Abstract THE PREPARATION OF LINEAR HIGH-MOLECULAR WEIGHT, FILM AND FIBER FORMING POLYESTER AND COPOLYESTERS WHEREIN THE REACTION OF POLYCARBOXYLIC ACID WITH A POLYOL TAKES PLACE IN THE PRESENCE OF CUPROUS AND CUPRIC INORGANIC SALTS TO IMPROVE PROCESSING AND END PRODUCT CHARACTERISTICS.
Inventors
- 👤 Brian A Dementi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:27
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/78; C08G63/82; C08G63/83; C08K; C08K3/00; C08K3/16
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) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |