US3917895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorinated polyolefin laminates bonded with an asphalt-atactic polypropylene mixture
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1973-09-14
•
Granted: 1975-11-04
•
Expires: 1993-09-14
Abstract
Abstract Polytetrafluoroethylene and similar fluorinated polyolefins are bonded to substrates by coating the polyolefin and substrate surfaces with a blend of asphalt and polypropylene and thereafter contacting the coated surfaces under pressure. This method results in a surprisingly strong bond and permits the application of fluorinated polyolefins to steel and other materials at significantly lower costs than methods available in the past.
Inventors
- 👤 David S Bosniack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:53
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B32B15/085; B32B11/00; B32B11/04; B32B11/08; B32B7/00; B32B7/04; B32B7/12; C; C08; C08L; C08L95/00; C09; C09D; C09D5/00; C09J; C09J123/00; C09J123/02; C09J123/10; C09J123/12; B32B2311/00; B32B2311/30; B32B2327/00; B32B2327/12; B32B2327/18; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31678; Y10T428/31717; Y10T428/31815
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
88 words
AN IMPROVED LAMINATED ARTICLE WHICH COMPRISES A SUPPORTING SUBSTRAT, AN AT LEAST PARTIAL COATING ON SAID SUBSTRATE OF A BLEND OF FROM ABOUT 20 TO ABOUT 80 WEIGHT PERCENT OF AN ASPHALT HAVING AN ASTM METHOD D5-25 PENETRATION VALUE BETWEEN ABOUT 20 AND ABOUT 500 AND AN ASTM METHOD D3636 SOFTENING POINT BETWEEN ABOUT 25@ AND ABOUT 150*C. AND FROM ABOUT 20 TO ABOUT 80 WEIGHT PERCENT OF ATACTIC POLYPROPYLENE, AND A LAYER OF FLUORINATED POLYOLEFIN BONDED TO SAID SUBSTRATE BY SAID BLEND OF ASPHALT AND ATACTIC POLYPROPLENE,
Claim 2
Dependent Claim
88 words
AN IMPROVED LAMINATED ARTICLE WHICH COMPRISES A SUPPORTING SUBSTRAT, AN AT LEAST PARTIAL COATING ON SAID SUBSTRATE OF A BLEND OF FROM ABOUT 20 TO ABOUT 80 WEIGHT PERCENT OF AN ASPHALT HAVING AN ASTM METHOD D5-25 PENETRATION VALUE BETWEEN ABOUT 20 AND ABOUT 500 AND AN ASTM METHOD D3636 SOFTENING POINT BETWEEN ABOUT 25@ AND ABOUT 150*C. AND FROM ABOUT 20 TO ABOUT 80 WEIGHT PERCENT OF ATACTIC POLYPROPYLENE, AND A LAYER OF FLUORINATED POLYOLEFIN BONDED TO SAID SUBSTRATE BY SAID BLEND OF ASPHALT AND ATACTIC POLYPROPLENE,
Claim 3
Dependent Claim
36 words
A laminated article as defined by claim 1 wherein said blend contains from about 65 to about 35 weight percent of said asphalt and from about 35 to about 65 weight percent of said atactic polypropylene.
Claim 4
Dependent Claim
24 words
A laminated article as defined in claim 1 wherein said asphalt has an ASTM Method D5-25 penetration value between about 30 and about 230.
Claim 5
Dependent Claim
20 words
A laminated article as defined in claim 1 wherein said substrate is a metal and said fluorinated polyolefin is polytetrafluoroethylene.
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) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |