Patent US2991199A successfully refreshed from Google Patents.
US2991199A
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Process for preparing heat sealable films, compositions useful therein and the articls produced thereby
Assignee: Dow Chemical Co
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Filing: 1958-09-15
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Granted: 1961-07-04
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Expires: 1978-09-15
Abstract
No abstract record available.
Inventors
- 👤 William R R Park
- 👤 Richard D Foley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:28
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/052; C08J2325/00; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2822; Y10T428/31504; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/31859
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A PROCESS FOR IMPARTING HEAT SEALABILITY TO THERMOPLASTIC ARTICLES FABRICATED FROM THE POLYMERIZATES OF MONOALKENYL AROMATIC MONOMERS CONSISTING OF APPLYING TO AT LEAST ONE SURFACE OF SAID THERMOPLASTIC ARTICLE A CONTINUOUS UNIFORM COATING OF A FILM FORMING COMPOSITION CONSISTING ESSENTIALLY OF A SOLUTION OF (1) ABOUT 40 PARTS BY WEIGHT OF A POLYVINYL ACETAL, (2) FROM ABOUT 5 TO 40 PARTS BY WEIGHT OF A POLYESTER OF AN ALKYL SUBSTITUTED BENZOIC ACID HAVING FROM 1 TO 8 CARBON ATOMS IN THE ALKYL GROUP AND A POLYOL, (3) FROM ABOUT 2 TO 20 PARTS BY WEIGHT OF AN ANTI-BLOCKING AGENT, (4) FROM 0.5 TO 3 PARTS BY WEIGHT OF A PLASTICIZER FOR SAID POLYVINYL ACETAL, FOLLOWED BY DRYING SAID CONTINUOUS COATING INTO A CONTINUOUS ADHERENT FUSED COATING.
Claim 2
Dependent Claim
126 words
A PROCESS FOR IMPARTING HEAT SEALABILITY TO THERMOPLASTIC ARTICLES FABRICATED FROM THE POLYMERIZATES OF MONOALKENYL AROMATIC MONOMERS CONSISTING OF APPLYING TO AT LEAST ONE SURFACE OF SAID THERMOPLASTIC ARTICLE A CONTINUOUS UNIFORM COATING OF A FILM FORMING COMPOSITION CONSISTING ESSENTIALLY OF A SOLUTION OF (1) ABOUT 40 PARTS BY WEIGHT OF A POLYVINYL ACETAL, (2) FROM ABOUT 5 TO 40 PARTS BY WEIGHT OF A POLYESTER OF AN ALKYL SUBSTITUTED BENZOIC ACID HAVING FROM 1 TO 8 CARBON ATOMS IN THE ALKYL GROUP AND A POLYOL, (3) FROM ABOUT 2 TO 20 PARTS BY WEIGHT OF AN ANTI-BLOCKING AGENT, (4) FROM 0.5 TO 3 PARTS BY WEIGHT OF A PLASTICIZER FOR SAID POLYVINYL ACETAL, FOLLOWED BY DRYING SAID CONTINUOUS COATING INTO A CONTINUOUS ADHERENT FUSED COATING.
References Cited (Backward Citations)
US2492512A
Cited
US2639249A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |