US3088844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Packaging material and process of making
Assignee: Millennium Petrochemicals Inc
•
Filing: 1959-09-03
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Granted: 1963-05-07
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Expires: 1979-09-03
Abstract
No abstract record available.
Inventors
- 👤 Gordon P Hungerford
- 👤 Charles W Cooper
- 👤 James L Kaufman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:51
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/44; D21H19/56; D21H19/60; B; B32; B32B; B32B27/00; C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/046; C08J7/052; C09; C09D; C09D131/00; C09D131/02; B05; B05D; B05D1/00; B05D1/28; B05D2201/00; B05D2401/00; B05D2401/20; C08J2323/00; C08J2323/02; C08J2431/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24975; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
146 words
A PROCESS FOR IMPROVING THE HEAT SEALABILITY OF POLYOLEFIN FILMS AND IMPARTING THERETO SUCH CHARACTERISTICS OF STIFFNESS AND HOT SLIP AS TO PERMIT THEIR USE IN COMMERICAL WRAPPING AND PACKAGING MACHINES WHICH CONSISTS ESSENTIALLY OF (1) TREATING THE SURFACE OF SAID POLOLEFIN TO REMDER IT ADHESIVE, (2) APPLYING TO SAID TREATED SURFACE A COATING OF 0.02 TO 0.5 MIL THICKNESS CONSISTING ESSENTIALLY OF A COPOLYMER OF VINYL ACETATE AND AN ETHYLENTICALLY UNSATURATED ACID HAVING UP TO 6 CARBON ATOMS WHEREIN SAID VINYL ACETATE IS IN THE AMOUNT OF ABOUT 85 TO ABOUT 98% BY WEIGHT AND SAID ACID IS IN THE AMOUNT OF ABOUT 2 TO ABOUT 15% BY WEIGHT, SAID COPOLYMER BEING CAPABLE OF FORMING A COHESIVE BOND AT TEMPERATURES BELOW THE TEMPERATURES AT WHICH SAID POLYOLEFIN BECOMES SUBSTANTIALLY DISTORTED, AND A FINELY DIVIDED INORGANIC SILICEOUS MATERIAL, AND (3) THEREAFTER DRYING SAID THUS COATED POLYOLEFIN.
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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) | 1966-05-06 | 1966-11-05 | 1967-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-06 | 1970-11-05 | 1971-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-06 | 1974-11-05 | 1975-05-07 | $7700.00 | Window Closed / Lapsed |