US3341500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolyester product
Assignee: EIDP Inc
•
Filing: 1964-06-30
•
Granted: 1967-09-12
•
Expires: 1984-06-30
Abstract
No abstract record available.
Inventors
- 👤 Schwarz Eckhard Christi August
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:10
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/181
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
THE LINEAR RANDOM COPOLYESTER OF ETHYLENE GLYCOL WITH A MIXTURE OF 90 TO 99 MOL PERCENT TEREPHTHALIC ACID AND 10 TO 1 MOL PERCENT 2,3,5,6-TETRAMETHYLTEREPHTHALIC ACID.
Claim 2
Dependent Claim
26 words
THE LINEAR RANDOM COPOLYESTER OF ETHYLENE GLYCOL WITH A MIXTURE OF 90 TO 99 MOL PERCENT TEREPHTHALIC ACID AND 10 TO 1 MOL PERCENT 2,3,5,6-TETRAMETHYLTEREPHTHALIC ACID.
References Cited (Backward Citations)
US2806877A
Cited
US2856375A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |