US3411967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of simultaneously foaming and laminating polyolefin film to a solid backing
Assignee: Millennium Petrochemicals Inc
•
Filing: 1964-07-14
•
Granted: 1968-11-19
•
Expires: 1984-07-14
Abstract
No abstract record available.
Inventors
- 👤 Stanley P Rowland
- 👤 Dorothee M Mcclain
- 👤 Melvin F Maringer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:51
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; Y; Y10; Y10S; Y10S264/00; Y10S264/05; Y10S264/13; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249982; Y10T428/249984; Y10T428/249987; Y10T428/24999
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A PROCESS FOR THE PRODUCTION OF A LAMINATE CONTAINING FOAMED PLASTIC FILMS HAVING SUBSTANTIALLY UNIFORM THICKNESSES AND SMOOTH SURFACES, WHICH CONSISTS OF THE SEQUENTAIL STEPS OF INTIMATELY MIXING A FINELY-DIVIDED SOLID, POLYOLEFIN WITH ABOUT 0.1 TO ABOUT 10 PERCENT BY WEIGHT OF A FINELY-DIVIDED SOLID BLOWING AGENT, FORMING AN UNFOAMED FILM HAVING A SUBSTANTIALLY UNIFORM THICKNESS AND SMOOTH SURFACE FROM SAID MIXTURE, PLACING THE FILM ON A SUBSTANTIALLY SOLID SUBSTRATE, AND HEATING THE FILM AND SUBSTRATE AT A TEMPERATURE SUFFICIENT TO DECOMPOSE SAID BLOWING AGENT AND TO MELT SAID POLYOLEFIN AND PRODUCE A FOAMED POLYOLEFIN FILM BONDED TO SAID SUBSTRATE.
Claim 2
Dependent Claim
100 words
A PROCESS FOR THE PRODUCTION OF A LAMINATE CONTAINING FOAMED PLASTIC FILMS HAVING SUBSTANTIALLY UNIFORM THICKNESSES AND SMOOTH SURFACES, WHICH CONSISTS OF THE SEQUENTAIL STEPS OF INTIMATELY MIXING A FINELY-DIVIDED SOLID, POLYOLEFIN WITH ABOUT 0.1 TO ABOUT 10 PERCENT BY WEIGHT OF A FINELY-DIVIDED SOLID BLOWING AGENT, FORMING AN UNFOAMED FILM HAVING A SUBSTANTIALLY UNIFORM THICKNESS AND SMOOTH SURFACE FROM SAID MIXTURE, PLACING THE FILM ON A SUBSTANTIALLY SOLID SUBSTRATE, AND HEATING THE FILM AND SUBSTRATE AT A TEMPERATURE SUFFICIENT TO DECOMPOSE SAID BLOWING AGENT AND TO MELT SAID POLYOLEFIN AND PRODUCE A FOAMED POLYOLEFIN FILM BONDED TO SAID SUBSTRATE.
References Cited (Backward Citations)
US2984161A
Cited
US3093525A
Cited
US2962407A
Cited
US2943949A
Cited
US2918702A
Cited
US3213071A
Cited
US2983962A
Cited
US3220901A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-19 | 1972-05-20 | 1972-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-19 | 1976-05-20 | 1976-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-19 | 1980-05-20 | 1980-11-19 | $7700.00 | Window Closed / Lapsed |