US4322211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Development of color in wood with aminobenzenesulfonyl azides
Assignee: Armstrong World Industries Inc
•
Filing: 1981-05-20
•
Granted: 1982-03-30
•
Expires: 2001-05-20
Abstract
Abstract The present invention discloses a method of photolytically developing a walnut wood color on a wood sample. The sample is contacted with a salt of an aminobenzenesulfonyl azide. The sample is thereafter exposed to a light source for an amount of time sufficient to produce a walnut wood color thereon.
Inventors
- 👤 Charles E. Hoyle
- 👤 Ronald S. Lenox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:30
CPC Classifications
B; B27; B27K; B27K5/00; B27K5/02; B27K3/00; B27K3/02; B27K3/0278; B27K3/34; B27K3/38; B27K5/003
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
77 words
A method of photolytically developing walnut wood color on a wood sample, which comprises treating the sample by contacting the surface area thereof with an acidic solution comprising water and a salt of an aminobenzenesulfonyl azide of the formula ##STR4## wherein R is H, a C 1 -C 4 alkoxy group or a C 1 -C 4 alkyl group, and exposing the treated sample to a light source to thereby develop a walnut color on the sample.
Claim 2
Independent Claim
77 words
A method of photolytically developing walnut wood color on a wood sample, which comprises treating the sample by contacting the surface area thereof with an acidic solution comprising water and a salt of an aminobenzenesulfonyl azide of the formula ##STR4## wherein R is H, a C 1 -C 4 alkoxy group or a C 1 -C 4 alkyl group, and exposing the treated sample to a light source to thereby develop a walnut color on the sample.
Claim 3
Dependent Claim
22 words
The method of claim 1 wherein the solution contains from 0.001 to 10 grams of the salt per 100 ml of water.
Claim 4
Dependent Claim
12 words
The method of claim 1 wherein the salt is a hydrochloride salt.
Claim 5
Dependent Claim
9 words
The method of claim 3 wherein R represents H.
Claim 6
Dependent Claim
11 words
The method of claim 3 wherein R represents OCH 3 .
Claim 7
Dependent Claim
16 words
The method of claim 1 wherein the pH of the solution is less than about 2.
Claim 8
Dependent Claim
29 words
The method of claim 1 which further comprises coating the wood article with a clear light screening agent after a desired walnut wood coloration is developed on the article.
Claim 9
Dependent Claim
22 words
The method of claim 1 wherein only a portion of the surface area of the sample is contacted with the acidic solution.
References Cited (Backward Citations)
US2772137A
Cited
US2964562A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-03-29 | 1985-09-28 | 1986-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-29 | 1989-09-28 | 1990-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-29 | 1993-09-28 | 1994-03-30 | $7700.00 | Window Closed / Lapsed |