US3789031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolyester fibers and filaments having defined shrinking properties
Assignee: Hoechst AG
•
Filing: 1970-10-30
•
Granted: 1974-01-29
•
Expires: 1990-10-30
Abstract
Abstract FIBERS AND FILAMENTS HAVING DEFINITE DEGREES OF SHRINKAGE IN HOT OR BOILING WATER AND IN ATMOSPHERE OF A HOT GAS ARE PROVIDED. THE FIBERS AND FILAMENTS CONSIST OF POLYETHYLENE TEREPHTHALATE MOSIFIED WITH 2,2-DIMETHYL-PROPANEDIOL-1,3.
Inventors
- 👤 G Buttner
- 👤 A Hartmann
- 👤 P Braun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:29
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/181; C08G63/183; D; D01; D01F; D01F6/00; D01F6/78; D01F6/84
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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |