Patent US3655818A successfully refreshed from Google Patents.
US3655818A
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Particulate adhesive containing polyepoxides carboxylated butadiene-acrylonitrile copolymer and a urea derivative as a curing agent
Assignee: 3M Co
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Filing: 1968-10-18
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Granted: 1972-04-11
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Expires: 1988-10-18
Abstract
Abstract A CURABLE STRUCTURAL ADHESIVE IN FLOWABLE, PARTICULATE FORM COMPRISING AN EPOXY RESIN MODIFIED WITH A NITRILE RUBBER PREFERABLY CONTAINING FREE CARBOXYL GROUPS, AND AN EPOXY CURING SYSTEM WHICH PREFERABLY WILL PROVIDE A CURE AT A TEMPERATURE NOT EXCEEDING ABOUT 250*F. UPON SUBJECTION TO ABOUT 150*F., THE ADHESIVE CONVERTS TO A STATE IN WHICH IT WILL READILY ADHERE TO VARIOUS SUBSTRATES INCLUDING METALS. ALSO PROVIDED ARE A PROCESS FOR APPLYING THE ADHESIVE AS WELL AS THE SUBSTRATES CONTAINING THE ADHESIVE BOTH IN THE FUSED, NON-CURED STATE AND THE CURED STATE.
Inventors
- 👤 Alan G Mckown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:27
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/10; B32B3/12; B32B15/00; B32B15/04; B32B15/043; B32B15/20; B32B7/00; B32B7/04; B32B7/12; C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08G59/4014; C08G59/4021; C08G59/44; C09; C09J; C09J163/00; B32B2305/00; B32B2305/02; B32B2305/024; B32B2405/00; C08L; C08L2666/00; C08L2666/02; C08L2666/04; C08L2666/08; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/24157; Y10T428/24165; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31522
Claims Analysis
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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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |