Patent US3670046A successfully refreshed from Google Patents.
US3670046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of bis-oxazolines and dithiol compounds as curing agents for polyepoxides
Assignee: Dow Chemical Co
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Filing: 1969-06-16
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Granted: 1972-06-13
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Expires: 1989-06-16
Abstract
Abstract wherein R alkylene, arylene or arylalkylene R'' hydrogen or lower alkyl R'''' alkylene, arylene, arylalkylene, cycloalkylene, or substituted cycloalkylene groups X -O- or -Sm 0 or 1 Y MOLAR QUANTITY OF MONOMERS AND DEGREE OF POLYMERIZATION OF POLYMERS. Also with excess of either I or II the polymer TO YIELD EPOXY RESIN COPOLYMERS, WHEN G is the moiety bridging between oxirane groups in a polyepoxide adapted to be cured to obtain an epoxy resin: and processes for making the above. The resins are adapted to be employed as adhesives, and as thermoplastic to thermoset polymers for production of plastic articles of manufacture.
Inventors
- 👤 Donald A Tomalia
- 👤 Bruce P Thill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:57
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/02; C08G69/00; C08G69/42; C08L; C08L63/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
15 words
Resin of claim 1 in which the polyamide comprises essentially recurring units of the structure
Claim 2
Dependent Claim
17 words
Resin of claim 1 in which the polyamide is comprised essentially of recurring units of the structure
Claim 3
Dependent Claim
17 words
Resin of claim 1 in which the polyamide is comprised essentially of recurring units of the structure
Claim 4
Dependent Claim
17 words
Resin of claim 1 in which the polyamide is comprised essentially of recurring units of the structure
Claim 5
Dependent Claim
17 words
Resin of claim 1 in which the polyamide is comprised essentially of recurring units of the structure
Claim 6
Dependent Claim
17 words
Resin of claim 1 in which the polyamide is comprised essentially of recurring units of the structure
Claim 7
Dependent Claim
17 words
Resin of claim 1 in which the polyamide is comprised essentially of recurring units of the structure
Claim 8
Dependent Claim
15 words
Resin of claim 1 in which the polyepoxide is a polyglycidyl ether of a bisphenol.
Claim 9
Dependent Claim
12 words
Resin of claim 1 in which the polyepoxide is an epoxy novolak.
Claim 10
Dependent Claim
14 words
Resin of claim 1 in which the polyepoxide is a polyepoxy polylower alkylene glycol.
Claim 11
Dependent Claim
16 words
Resin of claim 1 in which the polyepoxide is a halogenated polyglycidyl ether of a bisphenol.
Claim 12
Dependent Claim
10 words
Resin of claim 1 in which the polyepoxide is brominated.
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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |