US3773706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for indicating stage of cure of crosslinked resins and compositions resulting therefrom
Assignee: International Business Machines Corp
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Filing: 1971-11-26
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Granted: 1973-11-20
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Expires: 1991-11-26
Abstract
Abstract This invention discloses the use of phenosafranin with crosslinkable synthetic organic polymer resins as a visible qualitative degree-of-cure indicator. It also discloses the use of phenosafranin to enhance visibility of thin film of resin and to serve as a visible degree-of-mixing indicator. This invention also discloses novel compositions of matter containing curable synthetic organic polymer resins in combination with phenosafranin and dye.
Inventors
- 👤 H Dunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:39
CPC Classifications
C; C08; C08F; C08F2/00; C08G; C08G18/00; C08G18/06; C08G18/08; C08G59/00; C08G59/18; C08G85/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
24 words
The method of claim 1 wherein the phenosafranin constitutes from about 0.001 percent to about 2 percent, by weight of solids, of said system.
Claim 2
Dependent Claim
24 words
The method as defined in claim 2 wherein said cured synthetic organic reSin is selected from the group consisting of phenoxy/epoxy, epoxy and polyurethane.
Claim 3
Dependent Claim
13 words
The method of claim 3 wherein the synthetic organic resin is a phenoxy/epoxy.
Claim 4
Dependent Claim
13 words
The method according to claim 3 wherein the synthetic organic resin is epoxy.
Claim 5
Dependent Claim
13 words
The method according to claim 3 wherein the synthetic organic resin is polyurethane.
Claim 6
Dependent Claim
48 words
As a composition of matter, a mixture of a curable synthetic organic resin system and phenosafranin, said resin system capable of inter-action with phenosafranin to produce a color change when cured with a substance which enters into the curing reaction and becomes part of the final cured product.
Claim 7
Dependent Claim
23 words
The composition of claim 7 wherein said curable synthetic organic resin system is selected from the group consisting of phenoxy/epoxy, epoxy and polyurethane.
Claim 8
Dependent Claim
11 words
The composition of claim 8 wherein the resin system is phenoxy/epoxy.
Claim 9
Dependent Claim
11 words
The composition of claim 8 wherein the resin system is epoxy.
Claim 10
Dependent Claim
11 words
The composition of claim 8 wherein the resin system is polyurethane.
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) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |