US3901952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric thermo-detective material
Assignee: Panasonic Holdings Corp
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Filing: 1972-12-11
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Granted: 1975-08-26
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Expires: 1992-12-11
Abstract
Abstract A polymeric thermo-detective material is produced by molding a composition comprising nylon 11 or nylon 12 and an acid-catalyzed condensation product of a compound having at least one phenolic hydroxyl group and an aldehyde having a degree of polymerization of 20 or less. The thus obtained thermo-detective material has improved properties especially in resistance for moisture.
Inventors
- 👤 Yoshio Kishimoto
- 👤 Kazumasa Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:27
CPC Classifications
C; C08; C08L; C08L61/00; C08L61/04; C08L61/06; C08F; C08F8/00; C08F8/04; C08G; C08G8/00; C08G8/04; C08L77/00; C08L77/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
68 words
A POLYMERIC MATERIAL USED FOR FLEXIBLE THERMODETECTIVE WIRE COMPRISING NYLON 11, NYLON 12, OR A MIXTURE THEREOF AND AN ACID-CATALYZED CONDENSATION PRODUCT OF A COMPOUND HAVING AT LEAST ONE PHENOLIC HYDROXYL GROUP AND AN ALDEHYDE HAVING A DEGREE OF POLYMERIZATION OF 20 OR LESS, SAID ACID-CATALYZED CONDENSATION PRODUCT BEING PRESENT IN AN AMOUNT OF 5 TO 30 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF THE NYLON.
Claim 2
Dependent Claim
68 words
A POLYMERIC MATERIAL USED FOR FLEXIBLE THERMODETECTIVE WIRE COMPRISING NYLON 11, NYLON 12, OR A MIXTURE THEREOF AND AN ACID-CATALYZED CONDENSATION PRODUCT OF A COMPOUND HAVING AT LEAST ONE PHENOLIC HYDROXYL GROUP AND AN ALDEHYDE HAVING A DEGREE OF POLYMERIZATION OF 20 OR LESS, SAID ACID-CATALYZED CONDENSATION PRODUCT BEING PRESENT IN AN AMOUNT OF 5 TO 30 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF THE NYLON.
Claim 3
Dependent Claim
31 words
A polymeric thermo-detective material according to claim 1, wherein the compound having at least one phenolic hydroxyl group is an alkyl phenol, a di-alkyl phenol, an alkyl hydroxybenzoate, or a di-hydroxydiphenyl.
Claim 4
Dependent Claim
16 words
A polymeric thermo-detective material according to claim 1, wherein the aldehyde is formaldehyde, paraformaldehyde or benazldehyde.
Claim 5
Dependent Claim
27 words
A polymeric thermo-detective material according to claim 1, wherein the compound having at least one phenolic hydroxyl group is an alkyl phenol and the aldehyde is formaldehyde.
Claim 6
Dependent Claim
27 words
A polymeric thermo-detective material according to claim 1, wherein the compound having at least one phenolic hydroxyl group is an alkyl hydroxybenzoate and the aldehyde is formaldehyde.
Claim 7
Dependent Claim
20 words
A polymeric thermo-detective material according to claim 2, wherein the alkyl phenol or di-alkyl phenol has a C4-C30 alkyl group.
Claim 8
Dependent Claim
35 words
A polymeric thermo-detective material according to claim 2, wherein the alkyl hydroxybenzoate is prepared by reacting a hydroxybenzoic acid with an alcohol of the formula R-OH in which R is a C1- C30 alkyl group.
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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) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |