US3350328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the regeneration of polyethylene terephthalate
Assignee: Montedison SpA
•
Filing: 1964-11-10
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Granted: 1967-10-31
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Expires: 1984-11-10
Abstract
No abstract record available.
Inventors
- 👤 Cappuccio Vittorio
- 👤 Canonica Luigi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:12
CPC Classifications
C; C08; C08J; C08J11/00; C08J11/04; C08J11/06; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/40; C08G63/42; C08J2367/00; C08J2367/02; Y; Y02; Y02P; Y02P20/00; Y02P20/141; Y02P20/143; Y02W; Y02W30/00; Y02W30/50; Y02W30/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A PROCESS FOR RECOVERING POLYETHYLENE TEREPHTHALATE FROM WASTE POLYETHYLENE TEREPHTHALATE, WHICH PROCESS COMPRISES MELTING SAID POLYESTER WASTE, CONTACTING SAID MOLDTEN WASTE WITH FROM ABOUT 0.1-20% BY WEIGHT OF SAID POLYESTER WASTE OF ETHYLENE OXIDE AND SUBSEQUENTLY REMOVING THE UNREACTED ETHYLENE OXIDE AND VOLATILE MATERIALS TO RECOVER SAID POLYETHYLENE TEREPHTHALATE PRODUCT.
Claim 2
Dependent Claim
50 words
A PROCESS FOR RECOVERING POLYETHYLENE TEREPHTHALATE FROM WASTE POLYETHYLENE TEREPHTHALATE, WHICH PROCESS COMPRISES MELTING SAID POLYESTER WASTE, CONTACTING SAID MOLDTEN WASTE WITH FROM ABOUT 0.1-20% BY WEIGHT OF SAID POLYESTER WASTE OF ETHYLENE OXIDE AND SUBSEQUENTLY REMOVING THE UNREACTED ETHYLENE OXIDE AND VOLATILE MATERIALS TO RECOVER SAID POLYETHYLENE TEREPHTHALATE PRODUCT.
References Cited (Backward Citations)
GB905562A
Cited
US3305495A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-30 | 1971-05-01 | 1971-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-30 | 1975-05-01 | 1975-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-30 | 1979-05-01 | 1979-10-31 | $7700.00 | Window Closed / Lapsed |