Patent US4850156A successfully refreshed from Google Patents.
US4850156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of impregnating porous abrasive elements for use in distressing fabrics
Assignee: Individual
•
Filing: 1987-11-09
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Granted: 1989-07-25
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Expires: 2007-11-09
Abstract
Abstract A method of preparing porous abrasive rock for use in distressing fabric, including the steps of impregnating rocks placed in a vacuum vessel with a bleaching solution under reduced pressure, maintaining the reduced pressure for a first interval while injecting the solution beneath the rocks and then increasing the vessel pressure above ambient for a second interval prior to removal.
Inventors
- 👤 David L. Bellaire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:59
CPC Classifications
D; D06; D06B; D06B23/00; D06B23/20; D06B23/205; B; B24; B24B; B24B31/00; B24B31/12; B24B31/14; B24D; B24D3/00; B24D3/34; B24D3/348; D06B11/00; D06B11/0093; D06B11/0096; D06F; D06F58/00; D06F58/20; D06F58/203
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
134 words
A process for the preparation of porous abrasive elements for use in the intentional distressing of fabric which comprises the following steps: (a) placing a quantity of a porous abrasive rock in a vacuum vessel; (b) reducing the pressure in said vessel to a reduced pressure which is less than ambient pressure; (c) introducing a reactive solution which effects the fabric to be distressed and comprising 1 to 5% by weight of potassium or sodium permangante into said vessel to a level adequate to cover said rock; (d) maintaining the pressure in said vessel at substantially said reduced pressure during an interval including the introduction of said reactive solution to said vessel; (e) restoring the pressure within the vessel to approximately the ambient level; and (f) remove the impregnated rock from the vacuum vessel.
Claim 2
Dependent Claim
134 words
A process for the preparation of porous abrasive elements for use in the intentional distressing of fabric which comprises the following steps: (a) placing a quantity of a porous abrasive rock in a vacuum vessel; (b) reducing the pressure in said vessel to a reduced pressure which is less than ambient pressure; (c) introducing a reactive solution which effects the fabric to be distressed and comprising 1 to 5% by weight of potassium or sodium permangante into said vessel to a level adequate to cover said rock; (d) maintaining the pressure in said vessel at substantially said reduced pressure during an interval including the introduction of said reactive solution to said vessel; (e) restoring the pressure within the vessel to approximately the ambient level; and (f) remove the impregnated rock from the vacuum vessel.
Claim 3
Dependent Claim
50 words
The invention in accordance with claim 1 further comprising the steps of: (a) increasing the pressure within said vessel at the end of said interval to above ambient pressure; and (b) purging the reactive solution from the vessel prior to the restoration of the pressure therein to the ambient level.
Claim 4
Dependent Claim
25 words
The invention in accordance with claim 1 wherein the steps of restoring the pressure within said vessel and purging the reactive solution take place concurrently.
Claim 5
Dependent Claim
26 words
The invention in accordance with claim 3 further comprising the step of surface drying the solution impregnated rock prior to use in the distressing of fabric.
Claim 6
Dependent Claim
20 words
The invention in accordance with claim 2 wherein said reactive solution is introduced proximate to the bottom of said vessel.
Claim 7
Dependent Claim
38 words
The invention in accordance with claim 5 wherein the step of placing porous rock in a vacuum vessel includes maintaining said placed rock above the bottom surface of said vessel and introducing the solution beneath said placed rock.
Claim 8
Dependent Claim
27 words
The invention in accordance with claim 2 wherein said reduced pressure is within the range of 12 to 14 pounds per square inch below the ambient pressure.
Claim 9
Dependent Claim
22 words
The invention in accordance with claim 2 wherein said reduced pressure is approximately 12.25 pounds per square inch below the ambient pressure.
Claim 10
Dependent Claim
14 words
The invention in accordance with claim 7 wherein said interval is approximately 15 minutes.
Claim 11
Dependent Claim
51 words
The invention in accordance with claim 9 further comprising the steps of: (a) increasing the pressure within said vessel at the end of the interval to above ambient pressure; and (b) purging the reactive solution from the vacuum vessel prior to the restoration of the pressure therein to the ambient level.
Claim 12
Dependent Claim
27 words
The invention in accordance with claim 10 wherein the step of increasing the pressure includes raising the pressure approximately 10 pounds per square inch above ambient pressure.
Claim 13
Dependent Claim
25 words
The invention in accordance with claim 11 wherein the steps of increasing the pressure within said vessel and purging the reactive solution take place concurrently.
Claim 14
Dependent Claim
24 words
The invention in accordance with claim 2 further comprising the step of surface draying the solution impregnated rock prior to use in distressing fabric.
Claim 15
Dependent Claim
127 words
Porous abrasive elements for use in the intentional distressing of fabric produced by the process of: (a) placing a quantity of porous abrasive rock in a vacuum vessel; (b) reducing the pressure in said vessel to a reduced pressure which is less than ambient pressure; (c) introducing a reactive solution which effects the fabric to be distressed and comprising 1 to 5% by weight of potassium or sodium permanganate into said vessel to a level adequate to cover said rocks; (d) maintaining the pressure in said vessel at substantially said reduced pressure during an interval including the introduction of said reactive solution to said vessel; (e) restoring the pressure within the vessel to approximately the ambient level; and (f) remove the impregnated rock from the vacuum vessel.
Claim 16
Dependent Claim
127 words
Porous abrasive elements for use in the intentional distressing of fabric produced by the process of: (a) placing a quantity of porous abrasive rock in a vacuum vessel; (b) reducing the pressure in said vessel to a reduced pressure which is less than ambient pressure; (c) introducing a reactive solution which effects the fabric to be distressed and comprising 1 to 5% by weight of potassium or sodium permanganate into said vessel to a level adequate to cover said rocks; (d) maintaining the pressure in said vessel at substantially said reduced pressure during an interval including the introduction of said reactive solution to said vessel; (e) restoring the pressure within the vessel to approximately the ambient level; and (f) remove the impregnated rock from the vacuum vessel.
References Cited (Backward Citations)
US4086067A
Cited
US4581287A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-24 | 1993-01-23 | 1993-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-24 | 1997-01-23 | 1997-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-24 | 2001-01-23 | 2001-07-25 | $7700.00 | Window Closed / Lapsed |