US3814786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making polybutylene terephthalate blow molded article
Assignee: Celanese Corp
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Filing: 1972-06-12
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Granted: 1974-06-04
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Expires: 1992-06-12
Abstract
Abstract A POLYBUTYLENE TEREPHTHALATE MELT AT A TEMPERATURE IN THE RANGE OF THE MELT TEMPERATURE OF POLYBUTYLENE TEREPTHALATE AND 495*F., AND HAVING AM INTRINSIC VISOCITY OF AT LEAST 1.05 DECILITERSPER GRAM IS BLOW MOLDED INAN EXTRUSION BLOW MOLDING APPARATUS THE MOLD OF WHICH IS MAINTAINED AT A TEMPERATURE OF LESS THAN 150* F. TO PRODUCE POLYBUTYLENE TEREPHTHALATE BLOWN ARTICLES POSSESSING EXCELLENT STRENGTH CHARACTERISTICS. BOTTLES,ESPECIALLY AEROSOL PRESSURIZED BOTTLES,ARE APROMARY APPLICATION OF THE TYPE OF ARTICLES PRODUCED BY THIS PROCESS.
Inventors
- 👤 J Gall
- 👤 G Halek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:38
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; B; B29; B29C; B29C49/00; B29C49/0005
Claims Analysis
Total Claims: 0
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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) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |