US3931114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polybutylene terephthalate blow molded article
Assignee: Celanese Corp
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Filing: 1974-01-17
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Granted: 1976-01-06
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Expires: 1994-01-17
Abstract
Abstract Blow molded polybutylene terephthalate articles and a process for making them. A polybutylene terephthalate melt at a temperature in the range of the melt temperature of polybutylene terephthalate and 495°F., and having an intrinsic viscosity of at least 1.05 deciliters per gram is blow molded in an 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 a primary application of the type of articles produced by this process.
Inventors
- 👤 John S. Gall
- 👤 George W. Halek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:05
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/181; C08G63/183; B; B29; B29C; B29C49/00; B29C49/0005
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
29 words
A polybutylene terephthalate blow molded article wherein said polybutylene terephthalate has an intrinsic viscosity in the range of 1.05 to 1.4 deciliters per gram measured in orthochlorophenol at 25°C.
Claim 2
Dependent Claim
29 words
A polybutylene terephthalate blow molded article wherein said polybutylene terephthalate has an intrinsic viscosity in the range of 1.05 to 1.4 deciliters per gram measured in orthochlorophenol at 25°C.
Claim 3
Dependent Claim
33 words
A polybutylene terephthalate article in accordance with claim 1 wherein said polybutylene terephthalate has an intrinsic viscosity in the range of about 1.1 to 1.4 deciliters per gram measured in orthochlorophenol at 25°C.
Claim 4
Dependent Claim
17 words
A polybutylene terephthalate blow molded article in accordance with claim 1 wherein said article is a bottle.
Claim 5
Dependent Claim
16 words
A polybutylene terephthalate article in accordance with claim 3 wherein said bottle is an aerosol bottle.
References Cited (Backward Citations)
CA902821A
Cited
US3329653A
Cited
US3624024A
Cited
US3822332A
Cited
US3706111A
Cited
US3733309A
Cited
US3733309B1
Cited
US3745150A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |