US3591550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyethylene terephthalate stabilized with sulfur
Assignee: Inventa AG fuer Forschung und Patentverwertung
•
Filing: 1969-06-06
•
Granted: 1971-07-06
•
Expires: 1989-06-06
Abstract
Abstract SULPHUR IS ADDED TO A POLYESTER MASS DURING PRODUCTION OR PROCESSING THEREOF. THE RESULTANT SULPHUR CONTAINING POLYESTER HAS IMPROVED TENSILE STRENGTH AND ADHERENCE TO RUBBER.
Inventors
- 👤 Robert Nitschmann
- 👤 Wolfgang Griehl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:53
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/02; C08K3/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |