Patent US3889020A successfully refreshed from Google Patents.
US3889020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for treating wood
Assignee: Reichhold Chemicals Inc
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Filing: 1974-03-06
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Granted: 1975-06-10
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Expires: 1994-03-06
Abstract
Abstract This invention is directed to a method for producing and preserving very light colored wooden objects such as utility poles, fence posts and piling timbers. These wooden objects are treated under heat and pressure with a composition comprising a blend of (I) a blend of (A) from about 1% to about 50% by weight of pentachlorophenol and (B) from about 99% to about 50% by weight of a petroleum oil and (II) from about 0.005% to about 100% by weight based upon the total weight of (I) of a compound containing a heavy metal oxide. Wood treating compositions of this invention are stable against discoloration and formation of sludge during storage and during the wood treating process.
Inventors
- 👤 Joseph Amundsen
- 👤 William H Wetzel
- 👤 Norma Naimy
- 👤 Robert J Goodwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:43
CPC Classifications
B; B27; B27K; B27K3/00; B27K3/52; B27K3/02; B27K3/08; B27K3/16; B27K3/34; B27K3/36; B27K3/38; B27K3/40; B27K5/00; B27K5/02
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
108 words
A method for production of light colored wooden structures which comprises impregnating said wooden structures under pressure and vacuum with a composition comprising a blend of (I) a blend of (A) from about 1% to about 50% by weight of pentachlorophenol and (B) from about 99% to about 50% by weight of a petroleum hydrocarbon and (II) from about 0.005% to about 100% by weight, based upon the total weight of (A) and (B), of a member of a group consisting of metals selected from the class of elements classified in Groups IB, IIA, IIB, IVA, IVB, VIA, VIB, and VIII of the Periodic Table and oxides thereof.
Claim 2
Independent Claim
108 words
A method for production of light colored wooden structures which comprises impregnating said wooden structures under pressure and vacuum with a composition comprising a blend of (I) a blend of (A) from about 1% to about 50% by weight of pentachlorophenol and (B) from about 99% to about 50% by weight of a petroleum hydrocarbon and (II) from about 0.005% to about 100% by weight, based upon the total weight of (A) and (B), of a member of a group consisting of metals selected from the class of elements classified in Groups IB, IIA, IIB, IVA, IVB, VIA, VIB, and VIII of the Periodic Table and oxides thereof.
Claim 3
Independent Claim
34 words
THE METHOD FOR THE PRODUCTION OF LIGHT COLORED WOODEN STRUCTURES ACCORDING TO CLAIM WHEREIN THE AMOUNT OF COSOLVENTS, WAXES, RESINS, DECOLORANTS, SURFACTANTS AND INHIBITORS ADDED RANGES FROM ABOUT 0.01% TO ABOUT 1% BY WEIGHT.
Claim 4
Dependent Claim
53 words
A method for production of light colored wooden structures as defined in claim 1 wherein II is a member of a group consisting of metals selected from a group consisting of titanium, lead, tungsten, iron, chromium, tin, silver, and cobalt and oxides thereof and removing excess petroleum hydrocarbon from the impregnated wooden structures.
Claim 5
Dependent Claim
19 words
The method for production of light colored wooden structures according to claim 1 wherein (II) is a metal oxide.
Claim 6
Dependent Claim
48 words
The method for the production of light colored wooden structures according to claim 2 wherein (II) is at least one member selected from the group consisting of titanium dioxide, titanium oxide, titanium diboride, lead oxide, stannic oxide, silver oxide, chromic oxide, cobaltic oxide, tungsten trioxide and iron oxide.
Claim 7
Dependent Claim
28 words
The method according to claim 2 wherein (II) is at least one metal selected from a group consisting of titanium, lead, tungsten, iron, chromium, tin, silver, and cobalt.
Claim 8
Dependent Claim
41 words
The method for the production of light colored wooden structures according to claim 1 wherein (I) is a blend of (A) about 1% to about 10% by weight pentachlorophenol and (B) about 99% to about 90% by weight petroleum hydrocarbon oil.
Claim 9
Dependent Claim
39 words
The method for the production of light colored wooden structures according to claim 2 wherein the amount of (II) used ranges from about 0.01% to about 0.18% by weight based upon the total weight of (A) and (B) used.
Claim 10
Dependent Claim
31 words
The method for the production of light colored wooden structures according to claim 1 wherein from about 0.01% to about 0.1% by weight of bis (2-hydroxethyl) cocoamine is added to (I).
Claim 11
Dependent Claim
30 words
The method for the production of light colored wooden structures according to claim 1 wherein from about 0.01% to about 1% by weight of di-tertiary-butyl para-cresol is added to (I).
Claim 12
Dependent Claim
30 words
The method for the production of light colored wooden structures according to claim 1 wherein from about 0.01% to about 1% by weight of silicon dioxide is added to (I).
Claim 13
Dependent Claim
26 words
The method for the production of light colored wooden structures according to claim 1 wherein co-solvents, waxes, resins, decolorants, surfactants, and inhibitors and stabilizers are added.
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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) | 1978-06-09 | 1978-12-09 | 1979-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-09 | 1982-12-09 | 1983-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-09 | 1986-12-09 | 1987-06-10 | $7700.00 | Window Closed / Lapsed |