Patent US3678086A successfully refreshed from Google Patents.
US3678086A
Expired / Lapsed
US
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Complexes of heavy metal salts of acid phosphate esters
Assignee: FMC Corp
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Filing: 1970-03-27
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Granted: 1972-07-18
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Expires: 1990-03-27
Abstract
Abstract Compositions which are water-soluble ammonia complexes of heavy metal salts of acid phosphate organic esters, the organic groups containing an average of at least three carbon atoms, are used in water solutions to produce weather-resistant flame-retarding treatments for wood and other cellulosic bodies. The organic moieties are preferably chlorinated or brominated to improve their flame retardance.
Inventors
- 👤 Charles Andrew Lynch Jr
- 👤 Edward Francis Orwoll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:16
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
12 words
The complex of claim 1, in which the heavy metal is zinc.
Claim 2
Dependent Claim
12 words
The complex of claim 1, in which the heavy metal is copper.
Claim 3
Dependent Claim
30 words
The complex of claim 1, in which the heavy metal is zinc or copper, and the organic groups are selected from n-butyl, pHenyl, chlorinated propyl, chlorinated butyl, and brominated propyl.
Claim 4
Dependent Claim
103 words
A water-soluble ammonia complex of a neutral salt of a heavy metal capable of complexing with ammonia and a partial ester of phosphoric acid in which 1 to 2 of the active hydrogens of phosphoric acid is replaced by a residue of an alcohol or phenol which is substituted with chlorine or bromine, said residues when alkyl containing an average of at least 3 carbon atoms, and containing no more carbon atoms per residue than indicated by the formula , C atoms minus Cl atoms minus 2(Br) atoms 6 for alkyls and C atoms minus Cl atoms minus 2(Br) atoms 10 for aryls.
References Cited (Backward Citations)
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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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |