Patent US3681481A successfully refreshed from Google Patents.
US3681481A
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Catalytic addition of compounds having a p-h bond to acetylene
Assignee: Hooker Chemical Corp
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Filing: 1969-11-12
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Granted: 1972-08-01
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Expires: 1989-11-12
Abstract
Abstract Compounds containing a P-H bond add to acetylene in the presence of metal coordinating catalysts selected from groups VIA and VIII of the periodic table, to produce saturated organophosphorus compounds in good yields. The saturated organo-phosphorus compounds find utility as stabilizers, plasticizers and flame retardant additives for organic polymers, lubricating oils and hydraulic fluids.
Inventors
- 👤 Kingso Lin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:12
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5397; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4015; C07F9/4025; C07F9/50; C07F9/505; C07F9/5059; C08K5/50
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
19 words
The process of claim 1 in which the temperature of the reaction is from about 40* to about 180*C.
Claim 2
Dependent Claim
14 words
The process of claim 1 in which X is oxygen and n is 1.
Claim 3
Dependent Claim
11 words
The process of claim 1 in which the catalyst is dicarbonyldi-(triphenylphosphino)nickel.
Claim 4
Dependent Claim
13 words
The process of claim 1 in which the catalyst is dicarbonyldi (tri-n-butyl phosphino)nickel.
Claim 5
Dependent Claim
13 words
The process of claim 1 in which the catalyst is di(tributylphosphino) nickel bromide.
Claim 6
Dependent Claim
16 words
The process of claim 1 in which R is alkoxy of one to 18 carbon atoms.
Claim 7
Dependent Claim
16 words
The process of claim 1 in which R is alkyl of one to 18 carbon atoms.
References Cited (Backward Citations)
US2957931A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |