Patent US4550128A successfully refreshed from Google Patents.
US4550128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy composition
Assignee: International Business Machines Corp
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Filing: 1984-04-16
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Granted: 1985-10-29
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Expires: 2004-04-16
Abstract
Abstract A composition suitable for making circuitboards containing two different brominated epoxy polymeric components which are brominated diglycidyl ethers of bisphenol-A and epoxidized nonlinear novolak having at least about six terminal epoxy groups.
Inventors
- 👤 Leroy N. Chellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:51
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/02; C08G59/04; C08G59/06; C08G59/08; C08G59/18; C08G59/20; C08G59/22; C08G59/226; C08G59/30; C08G59/32; C08G59/38; H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/40; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/0353; C08J; C08J2363/00; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31518; Y10T428/31525
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
86 words
A composition of matter comprising: (A) about 25 to about 30 parts by weight of a tetrabrominated diglycidyl ether of bisphenol-A having an epoxy equivalent weight of about 350 to about 450; (B) about 10 to about 15 parts by weight of a second and different tetrabrominated diglycidyl ether of bisphenol-A having an epoxy equivalent weight of about 600 to about 750; and (C) about 55 to about 65 parts by weight of at least one epoxidized non-linear novolak having at least six terminal epoxy groups.
Claim 2
Dependent Claim
86 words
A composition of matter comprising: (A) about 25 to about 30 parts by weight of a tetrabrominated diglycidyl ether of bisphenol-A having an epoxy equivalent weight of about 350 to about 450; (B) about 10 to about 15 parts by weight of a second and different tetrabrominated diglycidyl ether of bisphenol-A having an epoxy equivalent weight of about 600 to about 750; and (C) about 55 to about 65 parts by weight of at least one epoxidized non-linear novolak having at least six terminal epoxy groups.
Claim 3
Dependent Claim
15 words
The composition of claim 1 wherein said novolak has at least eight terminal epoxy groups.
Claim 4
Dependent Claim
13 words
The composition of claim 1 wherein said novolak has the average formula: ##STR7##
Claim 5
Dependent Claim
25 words
The composition of claim 1 wherein (A) has an epoxy equivalent weight of about 400 and (B) has an epoxy equivalent weight of about 650.
Claim 6
Dependent Claim
29 words
The composition of claim 1 which contains about 28 parts by weight of (A); about 12 parts by weight of (B); and about 60 parts by weight of (C).
Claim 7
Dependent Claim
25 words
The composition of claim 5 wherein (A) has an epoxy equivalent weight of about 400; and (B) has an epoxy equivalent weight of about 650.
Claim 8
Dependent Claim
11 words
The composition of claim 1 which further includes an organic diluent.
Claim 9
Dependent Claim
34 words
The composition of claim 7 wherein said organic diluent is present in an amount of about 90 to about 120 parts by weight per hundred parts of the total of (A), (B), and (C).
Claim 10
Dependent Claim
23 words
The composition of claim 7 wherein said organic diluent is present in an amount of about 100 to about 116 parts by weight.
Claim 11
Dependent Claim
12 words
The composition of claim 7 wherein said organic diluent is a ketone.
Claim 12
Dependent Claim
11 words
The composition of claim 10 wherein said ketone is methylethyl ketone.
Claim 13
Dependent Claim
38 words
The composition of claim 1 which contains about 27 to about 29 parts by weight of (A); about 11 to about 13 parts by weight of (B); and about 58 to about 62 parts by weight of (C).
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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) | 1988-10-28 | 1989-04-29 | 1989-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-28 | 1993-04-29 | 1993-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-28 | 1997-04-29 | 1997-10-29 | $7700.00 | Window Closed / Lapsed |