Patent US3202528A successfully refreshed from Google Patents.
US3202528A
Expired / Lapsed
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Heat-seadable polypropylene film and method for producing same
Assignee: Hercules Powder Co
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Filing: 1962-12-31
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Granted: 1965-08-24
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Expires: 1982-12-31
Abstract
No abstract record available.
Inventors
- 👤 James Earl Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:20
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/12; C08J5/124; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/052; C08J2323/00; C08J2323/02; C08J2323/10; C08J2323/12; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/31504; Y10T428/31725; Y10T428/31739; Y10T428/31743; Y10T428/31746; Y10T428/31826; Y10T428/31833; Y10T428/31855; Y10T428/3188; Y10T428/31884; Y10T428/31888; Y10T428/31909; Y10T428/31913; Y10T428/3192
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
THE METHOD OF PRODUCING HEAT-SEALABLE, ORIENTED, STEREOREGULAR POLYPROPYLENE FILM COMPRISING TREATING AT LEAST ONE SURFACE OF SAID FILM WITH AN ELECTROSTATIC DISCHARGE TO RENDER THE SURFACE RECEPTIVE TO PRINTING INKS, APPLYING TO THE TREATED SURFACE A LIQUID COATING COMPOSITION COMPRISING A SOLUTION IN AN ORGANIC SOLVENT OF A THERMOPLASTIC FILM-FORMING MATERIAL SELECTED FROM THE GROUP CONSISTING OF COPOLYMERS OF VINYLIDENE CHLORIDE AND ACRYLONITRILE, COPOLYMERS OF VINYL CHLORIDE AND VINYL ACETATE, CHLORINATED RUBBERS, NITROCELLULOSE AND POLYAMIDES AND MELTING AT BELOW ABOUT 160*C. AND AN ACIDIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF CITRIC ACID, HEXACHLOROENDOMETHYLENE TETRAHYDROPHTHALIC ACID, AND THE RESINOUS REACTION PRODUCT OF A-TERPINENE AND MALEIC NAHYDRIDE, SAID ACIDIC MATERIAL BEING PRESENT IN A COMPATIBLE AMOUNT
Claim 2
Independent Claim
115 words
THE METHOD OF PRODUCING HEAT-SEALABLE, ORIENTED, STEREOREGULAR POLYPROPYLENE FILM COMPRISING TREATING AT LEAST ONE SURFACE OF SAID FILM WITH AN ELECTROSTATIC DISCHARGE TO RENDER THE SURFACE RECEPTIVE TO PRINTING INKS, APPLYING TO THE TREATED SURFACE A LIQUID COATING COMPOSITION COMPRISING A SOLUTION IN AN ORGANIC SOLVENT OF A THERMOPLASTIC FILM-FORMING MATERIAL SELECTED FROM THE GROUP CONSISTING OF COPOLYMERS OF VINYLIDENE CHLORIDE AND ACRYLONITRILE, COPOLYMERS OF VINYL CHLORIDE AND VINYL ACETATE, CHLORINATED RUBBERS, NITROCELLULOSE AND POLYAMIDES AND MELTING AT BELOW ABOUT 160*C. AND AN ACIDIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF CITRIC ACID, HEXACHLOROENDOMETHYLENE TETRAHYDROPHTHALIC ACID, AND THE RESINOUS REACTION PRODUCT OF A-TERPINENE AND MALEIC NAHYDRIDE, SAID ACIDIC MATERIAL BEING PRESENT IN A COMPATIBLE AMOUNT
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |