US3862288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Creep stabilization of plastic articles
Assignee: Continental Can Co Inc
•
Filing: 1973-06-22
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Granted: 1975-01-21
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Expires: 1993-06-22
Abstract
Abstract A method for imparting creep stabilization to a shaped article fabricated from an amorphous nitrile thermoplastic resin having a first glass transition temperature wherein the article is humidified to a moisture content of at least 1% and the glass transition temperature of the resin is lowered to a second glass transition temperature and the article while in a humidified state is heated to a temperature of 1* to 15*C below the second glass transition temperature for at least 0.5 hour.
Inventors
- 👤 Cheh-Jen Su
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:06
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/08; B; B29; B29C; B29C71/00; B29C71/02; C08J2333/00; C08J2333/18
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
10 words
The method of claim 1 wherein the mononitrile is acrylonitrile.
Claim 2
Dependent Claim
13 words
The method of claim 1 wherein the olefinically unsaturated monomer is methyl acrylate.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein the olefinically unsaturated monomer is styrene.
Claim 4
Dependent Claim
21 words
The method of claim 1 wherein the resin is a graft copolymer of an acrylonitrile-methyl acrylate copolymer and an acrylonitrile-butadiene rubber.
Claim 5
Dependent Claim
27 words
The method of claim 1 wherein the container is humidified until the container has a moisture content of from about 1.5 to about 3 percent by weight.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |