US3873498A
Expired / Lapsed
US
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Esters of 4-hydroxymethyl-1-phospha-2,6,7-trioxabicyclo {8 2,2,2{9 {0 octane and p-hydroxyphenylcarboxylic acids as stabilizers for organic polymers
Assignee: Novartis Corp
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Filing: 1973-07-25
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Granted: 1975-03-25
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Expires: 1993-07-25
Abstract
Abstract Esters of 4-hydroxymethyl-1-phospha-2,6,7trioxabicyclo(2,2,2)octan and p-hydroxyphenylcarboxylic acids are stabilisers for organic materials. They are prepared by reacting the 4-hydroxymethyl-1-phospha-2,6,7-trioxabicyclo(2,2,2)octan with a corresponding p-hydroxymethylcarboxylic acid.
Inventors
- 👤 Heimo Brunetti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:46
CPC Classifications
C; C09; C09K; C09K15/00; C09K15/04; C09K15/32; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/6564; C07F9/6571; C07F9/657109; C07F9/657145; C07F9/6574; C07F9/65748; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/527; C08K5/5398
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
31 words
A COMPOSITION OF MATTER COMPRISING AN ORGANIC POLYMER SUBJECT TO THERMO OXIDATIVE OR LIGHT-INDUCED DEGRADATION AND FROM 0.005 TO 5 PERCENT BY WEIGHT OF A STABILIZING COMPOUND OF THE GENERAL FORMULA
Claim 2
Dependent Claim
31 words
A COMPOSITION OF MATTER COMPRISING AN ORGANIC POLYMER SUBJECT TO THERMO OXIDATIVE OR LIGHT-INDUCED DEGRADATION AND FROM 0.005 TO 5 PERCENT BY WEIGHT OF A STABILIZING COMPOUND OF THE GENERAL FORMULA
Claim 3
Dependent Claim
17 words
A composition of claim 1 containing from 0.1 to 1 percent by weight of the stabilizing compound.
Claim 4
Dependent Claim
33 words
A composition of matter according to claim 1 wherein R1 represents alkyl containing from 1-18 carbon atoms, cycloalkyl containing from 6-8 carbon atoms or aralkyl containing 7-9 carbon atoms, and R3 represents hydrogen.
Claim 5
Dependent Claim
12 words
A composition according to claim 3 wherein the polymer is a polyamide.
Claim 6
Dependent Claim
12 words
A composition according to claim 3 wherein the polymer is a polyolefin.
Claim 7
Dependent Claim
11 words
A composition according to claim 5 wherein the polyolefin is polypropylene.
Claim 8
Dependent Claim
11 words
A composition according to claim 6 wherein the polymer is polyethylene.
Claim 9
Dependent Claim
11 words
A composition according to claim 3 wherein the polymer is polystyrene.
Claim 10
Dependent Claim
18 words
A composition according to claim 3 wherein the polymer is a terpolymer of ethylene, propylene and a diene.
Claim 11
Dependent Claim
11 words
A composition according to claim 3 wherein the polymer is polyacrylonitrile.
Claim 12
Dependent Claim
17 words
A composition according to claim 3 wherein the polymer is a copolymer of acrylonitrile, butadiene and styrene.
Claim 13
Dependent Claim
16 words
A composition accordiing to claim 3 wherein the polymer is a vinyl polymer which contains halogen.
Claim 14
Dependent Claim
12 words
A composition accordiNg to claim 3 wherein the polymer is a polyester.
Claim 15
Dependent Claim
12 words
A composition according to claim 3 wherein the polymer is a polyurethane.
Claim 16
Dependent Claim
12 words
A composition according to claim 3 wherein the polymer is a polycarbonate.
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) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |