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US4400495A
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Wood modifying composition
Assignee: Belarusian National Technical University
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Filing: 1981-08-26
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Granted: 1983-08-23
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Expires: 2001-08-26
Abstract
Abstract Disclosed is a wood modifying composition comprising the following components taken in percent by mass: -phenol-furfural-formaldehyde resin 72.0 to 94.0 -catalyst 0.8 to 1.5 -stabilizing agent 0.5 to 1.5 -organic solvent the balance to 100. -
Inventors
- 👤 Gennady M. Shutov
- 👤 Maiya E. Erdman
- 👤 Adel I. Solomakha
- 👤 Evgeny A. Kalennikov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:26
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/28; C08K; C08K5/00; C08K5/56; B; B27; B27K; B27K3/00; B27K3/02; B27K3/15
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
47 words
A wood modifying composition comprising the following components take in percent by mass: ______________________________________
phenol-furfural-formaldehyde resin
72.0 to 94.0
benzensulfonic acid catalyst
0.8 to 1.5
stabilizing agent selected from
the group consisting of ferrocene,
monoacetylferrocene and mixtures
thereof 0.5 to 1.5
acetone the balance to 100
______________________________________
Claim 2
Dependent Claim
47 words
A wood modifying composition comprising the following components take in percent by mass: ______________________________________
phenol-furfural-formaldehyde resin
72.0 to 94.0
benzensulfonic acid catalyst
0.8 to 1.5
stabilizing agent selected from
the group consisting of ferrocene,
monoacetylferrocene and mixtures
thereof 0.5 to 1.5
acetone the balance to 100
______________________________________
Claim 3
Dependent Claim
13 words
A composition as defined in claim 1, wherein the stabilizing agent is ferrocene.
Claim 4
Dependent Claim
13 words
A composition as defined in claim 1, wherein the stabilizing agent is monoacetylferrocene.
Claim 5
Dependent Claim
18 words
A composition as defined in claim 1, wherein the stabilizing agent is a mixture of ferrocene and monoacetylferrocene.
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) | 1986-08-22 | 1987-02-21 | 1987-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-22 | 1991-02-21 | 1991-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-22 | 1995-02-21 | 1995-08-23 | $7700.00 | Window Closed / Lapsed |