US3098046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing finely divided polyethylene terephthalate from polyethylene terephthalate scraps
Assignee: Glanzstoff AG
•
Filing: 1960-04-12
•
Granted: 1963-07-16
•
Expires: 1980-04-12
Abstract
No abstract record available.
Inventors
- 👤 Siggel Erhard
- 👤 Riehl Lothar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:24
CPC Classifications
C; C08; C08J; C08J11/00; C08J11/04; C08J11/10; C08J11/14; C08G; C08G63/00; C08G63/88; C08J2367/00; C08J2367/02; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
101 words
A CONTINUOUS PROCESS FOR CONVERTING POLYETHYLENE TEREPHTHALATE SCRAP INTO POWDER FROM WHICH COMPRISES PASSING SAID SCRAP THROUGH A VESSEL HEATED TO A TEMPERATURE OFF FROM ABOUT 220*C. TO ABOUT 240*C., CONTACTING SAID SCRAP WITH A COUNTERCURRENT FLOW OF SUPERHEATED STEAM, REGULATING THE CONTACT TIME AND TEMPERTURE OF THE STREAM SO THAT THE SCRAP WILL HAVE A RELATIVE VISOCITY OF LESS THAN ABOUT NREL 1.4 WHEN IT REACHES THE LOWER END OF SAID VESSEL AND SO THAT SAID SCRAP WILL BE MAINTAINED IN A SOLID STATE, CONTINUOUSLY WITHDRAWING THE SCRAP FROM SAID VESSEL AND THEREAFTER REDUCING THE POLYETHYLENE TEREPHTHALATE TO A POWDER.
References Cited (Backward Citations)
GB610183A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-07-15 | 1967-01-14 | 1967-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-15 | 1971-01-14 | 1971-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-15 | 1975-01-14 | 1975-07-16 | $7700.00 | Window Closed / Lapsed |