Patent US3345331A successfully refreshed from Google Patents.
US3345331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poly [ethylene terephthalate/4-(3-oxypropoxy) benzoate]
Assignee: EIDP Inc
•
Filing: 1963-11-18
•
Granted: 1967-10-03
•
Expires: 1983-11-18
Abstract
No abstract record available.
Inventors
- 👤 Jr Millard Griffin Reese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:29
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
THE COPOLYESTER CHARACTERIZED AS A LINEAR POLYMER CONSISTING ESSENTIALLY OF A SUCCESSION OF RECURRING STRUCTURAL UNITS REPRESENTED BY THE FORMULAS:
Claim 2
Dependent Claim
20 words
THE COPOLYESTER CHARACTERIZED AS A LINEAR POLYMER CONSISTING ESSENTIALLY OF A SUCCESSION OF RECURRING STRUCTURAL UNITS REPRESENTED BY THE FORMULAS:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |