US3770559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-sensitive adhesive laminate
Assignee: Evode Ltd
•
Filing: 1971-01-11
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Granted: 1973-11-06
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Expires: 1991-01-11
Abstract
Abstract A waterproof pressure sensitive adhesive laminate is provided in which a flexible plastics backing sheet is coated with a bituminous adhesive composition containing a minor proportion of rubber or thermoplastic polymer. The backing sheet is reinforced with a mesh or a woven or non-woven fabric which is embedded in the sheet and provides substantial resistance to stretching.
Inventors
- 👤 B Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:15
CPC Classifications
B; B32; B32B; B32B11/00; B32B11/04; B32B11/08; C; C09; C09J; C09J7/00; C09J7/20; C09J7/29; B32B11/06; B32B11/10; B32B15/00; B32B15/20; C09J7/22; C09J7/28; B32B2262/00; B32B2262/02; B32B2262/0261; B32B2262/0269; B32B2307/00; B32B2307/70; B32B2307/726; B32B2307/7265; B32B2311/00; B32B2311/24; B32B2405/00; C09J2400/00; C09J2400/10; C09J2400/16; C09J2400/163; C09J2400/20; C09J2400/26; C09J2400/263; C09J2423/00; C09J2423/04; C09J2477/00; C09J2477/006; C09J2495/00; Y; Y10; Y10T; Y10T428/00; Y10T428/14; Y10T428/141; Y10T428/24; Y10T428/24942; Y10T428/2495
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
36 words
A waterproof pressure sensitive adhesive laminate according to claim 1 wherein the adhesive comprises bitumen and polyethylene, the polyethylene being present in an amount of from 5 percent to 18 percent by weight of the bitumen.
Claim 2
Dependent Claim
100 words
A waterproof pressure-sensitive adhesive laminate which comprises a layer of a pressure sensitive bituminous adhesive composition containing a minor proportion of a rubber or thermoplastic polymer coated onto each surface of a reinforcement consisting essentially of a self-bonded, non-woven polyamide fabric having substantial resistance to stretching, one of the exposed surfaces of said adhesive composition being bonded to a thermoplastic or metal foil and the other being protected with a releasable protective layer of sheet material in contact with the exposed surface of the adhesive composition, the total thickness of the adhesive being greater than the thickness of the foil.
Claim 3
Dependent Claim
36 words
A waterproof pressure sensitive adhesive laminate according to claim 3 wherein the adhesive comprises bitumen and polyethylene, the polyethylene being present in an amount of from 5 percent to 18 percent by weight of the bitumen.
Claim 4
Dependent Claim
135 words
A pressure-sensitive adhesive laminate which comprises a backing sheet in the form of a metal foil selected from the group consisting of aluminium foil having a thickness of from 0.0005 inch to 0.005 inch, a soft temper coffer foil having a thickness of not more than about 0.002 inch, lead foil of 6 to 12 ozs. per sq. foot and stainless steel foil having a thickness of from 0.00025 inch to 0.00075 inch, a layer of a pressure-sensitive adhesive composition which is adhered to said foil and is thicker than said foil, a releasable protective layer of sheet material in contact with the exposed surface of the adhesive composition and said adhesive comprises bitumen and polyethylene, the polyethylene being present in an amount of from 5 percent to 18 percent by weight of the bitumen.
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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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |