US2955054A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing heat sealable films
Assignee: Dow Chemical Co
•
Filing: 1958-08-01
•
Granted: 1960-10-04
•
Expires: 1978-08-01
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
2026-10-28 03:35
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/042; C08J7/043; C08J7/052; C08J2325/00; C08J2421/00; C08J2421/02; C08J2443/00; C08J2443/02; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31859; Y10T428/31909; Y10T428/31924
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A PROCESS FOR IMPARTING HEAT SEALABILITY TO THERMOPLASTIC ARTICLES FABRICATED FROM THE POLYMERIZATES OF MONOALKENYL AROMATIC MONOMERS CONSISTING OF THE SEQUENTIAL STEPS OF (1) APPLYING TO AT LEAST ONE SURFACE OF SAID THERMOPLASTIC ARTICLE A CONTINUOUS UNIFORM COATING OF A FILM-FORMING LATEX OF A COPOLYMER OF A MONOALKENYL AROMATIC COMONOMER AND A CONJUGATED DIOLEFIN, (2) DRYING SAID COATING TO A CLEAR COHERENT COATING, (3) APPLYING TO THE SO-TREATED SURFACE A CONTINUOUS UNIFORM COATING OF A SOLUTION OF A POLYVINYL ACETAL, AND, (4) DRYING SAID COATING OF STEP (3) TO A CLEAR COHERENT COATING.
Claim 2
Dependent Claim
93 words
A PROCESS FOR IMPARTING HEAT SEALABILITY TO THERMOPLASTIC ARTICLES FABRICATED FROM THE POLYMERIZATES OF MONOALKENYL AROMATIC MONOMERS CONSISTING OF THE SEQUENTIAL STEPS OF (1) APPLYING TO AT LEAST ONE SURFACE OF SAID THERMOPLASTIC ARTICLE A CONTINUOUS UNIFORM COATING OF A FILM-FORMING LATEX OF A COPOLYMER OF A MONOALKENYL AROMATIC COMONOMER AND A CONJUGATED DIOLEFIN, (2) DRYING SAID COATING TO A CLEAR COHERENT COATING, (3) APPLYING TO THE SO-TREATED SURFACE A CONTINUOUS UNIFORM COATING OF A SOLUTION OF A POLYVINYL ACETAL, AND, (4) DRYING SAID COATING OF STEP (3) TO A CLEAR COHERENT COATING.
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) | 1963-10-04 | 1964-04-04 | 1964-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-04 | 1968-04-04 | 1968-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-04 | 1972-04-04 | 1972-10-04 | $7700.00 | Window Closed / Lapsed |