US4436782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oligomer pellets of ethylene terephthalate
Assignee: EIDP Inc
•
Filing: 1982-05-03
•
Granted: 1984-03-13
•
Expires: 2002-05-03
Abstract
Abstract Preparation of free-flowing pellets of ethylene terephthalate oligomer by water quenching droplets of molten oligomer.
Inventors
- 👤 Chungfah H. Ho
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:25
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; B; B29; B29B; B29B9/00; C08J2367/00; C08J2367/02; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
Free-flowing pellets of ethylene terephthalate oligomer of from about 0.08 to 0.15 intrinsic viscosity, said pellets being in the form of slightly flattened beads having a thickness of about 0.3 to 2.0 mm and a circular diameter of 0.8 to 4.0 mm, said pellets having a bulk density of from about 37 to 50 pounds per cubic foot.
Claim 2
Dependent Claim
58 words
Free-flowing pellets of ethylene terephthalate oligomer of from about 0.08 to 0.15 intrinsic viscosity, said pellets being in the form of slightly flattened beads having a thickness of about 0.3 to 2.0 mm and a circular diameter of 0.8 to 4.0 mm, said pellets having a bulk density of from about 37 to 50 pounds per cubic foot.
References Cited (Backward Citations)
US3033826A
Cited
US3342782A
Cited
US3657388A
Cited
US3969324A
Cited
US3843340A
Cited
US4165420A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-13 | 1987-09-12 | 1988-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-13 | 1991-09-12 | 1992-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-13 | 1995-09-12 | 1996-03-13 | $7700.00 | Window Closed / Lapsed |