US3616044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precross-linked adhesive and bonding process utilizing same
Assignee: WR Grace and Co
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Filing: 1968-06-05
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Granted: 1971-10-26
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Expires: 1988-06-05
Abstract
Abstract This invention relates to precross-linked adhesives having a gel content of at least 4 percent comprising prior to cross-linking a thermoplastic polymeric material in combination with a source for generating free radicals and a process for forming a bond between contiguous surfaces of metallic elements using the aforesaid precross-linked adhesive.
Inventors
- 👤 Clifton L Kehr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:26
CPC Classifications
C; C09; C09J; C09J5/00; C09J5/10
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
27 words
The method according to claim 1 wherein the elements to be united are selected from the group consisting of metals, glass, wood, fabrics, plastics, rubbers and leather
Claim 2
Dependent Claim
30 words
The method according to claim 2 wherein the metal is selected from the group consisting of aluminum, tin-free steel, tin plate, aluminum-coated steel, chromium-coated steel, surface-treated aluminum and surface-treated steel.
Claim 3
Dependent Claim
39 words
The method according to claim 1 wherein the polar thermoplastic polymeric material is a copolymer of ethylene and a member of the group consisting of acrylic acid and methacrylic acid and the free-radical-generating cross-linking agent is p-quinone dioxime dibenzoate.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |