Patent US4065591A successfully refreshed from Google Patents.
US4065591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pitch impregnated articles and process for making same
Assignee: Ashland LLC
•
Filing: 1976-01-16
•
Granted: 1977-12-27
•
Expires: 1996-01-16
Abstract
Abstract Disclosed is a pitch impregnant composition comprising coal tar pitch, oxidized, or unoxidized petroleum pitch with stearic acid, and particulated metallic pigments including copper, aluminum, steel, silver, iron, tin, nickel and zinc metals and copper-zinc alloys. The process comprises forcing the molten impregnant composition into the surface of the porous article preferably by imposing pressure on the impregnant composition while the article to be treated is immersed therein. Articles so treated exhibit a metallic surface appearance.
Inventors
- 👤 Charles R. Gannon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:00
CPC Classifications
F; F16; F16L; F16L58/00; F16L58/02; F16L58/04; F16L58/12; B; B05; B05D; B05D5/00; B05D5/06; B05D5/067; B44; B44F; B44F9/00; B44F9/10; C; C08; C08K; C08K3/00; C08K3/02; C08K3/08; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1303; Y10T428/1352; Y10T428/1355; Y10T428/31504; Y10T428/31678; Y10T428/31717; Y10T428/31815; Y10T428/31819; Y10T428/31823
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
166 words
A process for preparing an at least partially impregnated porous article having a metallic colored surface comprising; a. mixing a liquid molten pitch selected from the group consisting of coal tar pitch, unoxidized petroleum pitch, oxidized petroleum pitch and mixtures thereof, with stearic acid and a particulated metallic pigment previously milled in the presence of stearic acid; in a ratio of about 4 to about 30 parts by weight of added stearic acid per 100 parts by weight of metallic pigment; b. immersing said porous article in the resultant mixture of liquid molten pitch, particulated pigment, and stearic acid; c. forcing a portion of said liquid mixture into at least part of the pore spaces of said porous article; and d. removing said article from contact with said mixture of molten pitch, particulated pigment and stearic acid, thereby causing said molten pitch to penetrate at least partially into said porous article and to deposit particulated pigment within the pitch film on the surface of said article.
Claim 2
Dependent Claim
166 words
A process for preparing an at least partially impregnated porous article having a metallic colored surface comprising; a. mixing a liquid molten pitch selected from the group consisting of coal tar pitch, unoxidized petroleum pitch, oxidized petroleum pitch and mixtures thereof, with stearic acid and a particulated metallic pigment previously milled in the presence of stearic acid; in a ratio of about 4 to about 30 parts by weight of added stearic acid per 100 parts by weight of metallic pigment; b. immersing said porous article in the resultant mixture of liquid molten pitch, particulated pigment, and stearic acid; c. forcing a portion of said liquid mixture into at least part of the pore spaces of said porous article; and d. removing said article from contact with said mixture of molten pitch, particulated pigment and stearic acid, thereby causing said molten pitch to penetrate at least partially into said porous article and to deposit particulated pigment within the pitch film on the surface of said article.
Claim 3
Dependent Claim
34 words
The method of claim 1 wherein said particulated pigment is a particulated metal selected from the group consisting of aluminum, silver, stainless steel, iron, tin, nickel, copper, zinc, and alloys of copper and zinc.
Claim 4
Dependent Claim
85 words
A porous permeable article having a metallic colored surface and impregnated, at least at its surface, with a pitch selected from the group consisting of coal tar pitch, unoxidized petroleum pitch, oxidized petroleum pitch and mixtures thereof, containing added stearic acid and an at least partially dispersed particulated metallic pigment previously milled in the presence of stearic acid, the ratio of added stearic acid to metallic pigment being between about 4 and about 30 parts by weight per 100 parts by weight of metallic pigment.
Claim 5
Dependent Claim
85 words
A porous permeable article having a metallic colored surface and impregnated, at least at its surface, with a pitch selected from the group consisting of coal tar pitch, unoxidized petroleum pitch, oxidized petroleum pitch and mixtures thereof, containing added stearic acid and an at least partially dispersed particulated metallic pigment previously milled in the presence of stearic acid, the ratio of added stearic acid to metallic pigment being between about 4 and about 30 parts by weight per 100 parts by weight of metallic pigment.
Claim 6
Dependent Claim
13 words
The article of claim 3 wherein said partially dispersed pigment is particulated aluminum.
Claim 7
Dependent Claim
26 words
The article of claim 3 wherein said pitch comprises petroleum pitch selected from the group consisting of oxidized petroleum pitch, unoxidized petroleum pitch and mixtures thereof.
Claim 8
Dependent Claim
12 words
The article of claim 3 wherein said pitch is coal tar pitch.
Claim 9
Dependent Claim
12 words
The article of claim 3 wherein said pitch is oxidized petroleum pitch.
Claim 10
Dependent Claim
12 words
The article of claim 3 wherein said pitch is unoxidized petroleum pitch.
Claim 11
Dependent Claim
12 words
The article of claim 9 wherein said dispersed pigment is particulated aluminum.
Claim 12
Dependent Claim
111 words
An impregnated pipe having a metallic colored surface comprising; a. a porous tubular body; b. a solidified pitch selected from the group consisting of coal tar pitch, oxidized petroleum pitch, unoxidized petroleum pitch and mixtures thereof at least partially permeating into the porous spaces of said tubular body, and forming a film of pitch over at least a portion of the tubular body surface; and c. stearic acid and aluminum pigment previously milled in the presence of stearic acid contained within said film of pitch, the ratio of stearic acid to pigment being between about 4 and and about 30 parts by weight per 100 parts by weight of metallic pigment.
Claim 13
Dependent Claim
111 words
An impregnated pipe having a metallic colored surface comprising; a. a porous tubular body; b. a solidified pitch selected from the group consisting of coal tar pitch, oxidized petroleum pitch, unoxidized petroleum pitch and mixtures thereof at least partially permeating into the porous spaces of said tubular body, and forming a film of pitch over at least a portion of the tubular body surface; and c. stearic acid and aluminum pigment previously milled in the presence of stearic acid contained within said film of pitch, the ratio of stearic acid to pigment being between about 4 and and about 30 parts by weight per 100 parts by weight of metallic pigment.
Claim 14
Dependent Claim
15 words
The pipe of claim 10 in which the porous tubular body comprises interfelted cellulose fibers.
Claim 15
Dependent Claim
55 words
The pipe of claim 10 in which; a. the porous tubular body comprises interfelted cellulose fibers; b. the solidified impregnant comprises an unoxidized petroleum pitch; and c. the aluminum pigment comprises a leafing aluminum pigment previously milled in the presence of stearic acid supported at or near the exterior surface of said film of impregnant.
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) | 1980-12-26 | 1981-06-27 | 1981-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-26 | 1985-06-27 | 1985-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-26 | 1989-06-27 | 1989-12-27 | $7700.00 | Window Closed / Lapsed |