Patent US3661675A successfully refreshed from Google Patents.
US3661675A
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Method of using polyethylene terephthalate as a bonding adhesive
Assignee: General Dynamics Corp
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Filing: 1968-10-30
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Granted: 1972-05-09
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Expires: 1988-10-30
Abstract
Abstract A method of bonding a sheet or film of polyethylene terephthalate to another sheet of polyethylene terephthalate or in employing a sheet of polyethylene terephthalate as a high strength adhesive for bonding materials together wherein the sheet or sheets of polyethylene terephthalate are placed in pressure contact with each other or in pressure contact with materials to be bonded together, in a continuously evacuated environment and are heated to a temperature sufficient to out gas impurities from the polyethylene terephthalate sheets and fuse the sheets to the adjacent surface.
Inventors
- 👤 Jozef Frankowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:54
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/043; B29; B29C; B29C66/00; B29C66/001; B29C65/00; B29C65/02; B29C65/14; B29C66/0012; B29C66/0014; B29C66/00145; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/45; B29C66/70; B29C66/71; B29C66/80; B29C66/81; B29C66/812; B29C66/8124; B29C66/81241; B29C66/82; B29C66/826; B29C66/8266; B29C66/82661; B32B27/00; B32B7/00; B32B7/04; B32B7/12; B29C66/818; B32B2367/00; B32B2405/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
The method according to claim 1, wherein a porous sheet being non-bondable with polyethylene terephthalate at said temperatures is positioned upon the sandwich assembly in direct contact with the polyethylene terephthalate sheet and an over-plate is positioned upon said porous sheet so as to cause the polyethylene terephthalate sheet to be in more intimate contact with said second sheet of material.
Claim 2
Dependent Claim
41 words
The method according to claim 2, wherein the second sheet of material is polyethylene terephthalate, and comprising the additional step of disposing a porous sheet being non-bondable with polyethylene terephthalate at said temperatures between the sandwich assembly and said rigid surface.
References Cited (Backward Citations)
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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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |