US4395504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesive system for particleboard manufacture
Assignee: SUN CDHEMICAL Corp
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Filing: 1982-09-07
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Granted: 1983-07-26
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Expires: 2002-09-07
Abstract
Abstract A formaldehyde-free adhesive system for the manufacture of particleboard comprises the reaction product of a cyclic urea and glyoxal in an equivalent ratio of about 1.1-1.5:1.
Inventors
- 👤 Theodore Sulzberg
- 👤 Chi Ma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:12
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/26; C09; C09J; C09J161/00; C09J161/20; C09J161/26; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/253; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998; Y10T428/31504; Y10T428/31942; Y10T428/31949; Y10T428/31957; Y10T428/31971; Y10T428/31989
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
40 words
In a particleboard that comprises particles of wood and a formaldehyde-free resin adhesive system, the improvement wherein the resin adhesive system comprises the product of the reaction of a cyclic urea and glyoxal in the equivalent ratio of about 1.1-1.5:1.
Claim 2
Dependent Claim
40 words
In a particleboard that comprises particles of wood and a formaldehyde-free resin adhesive system, the improvement wherein the resin adhesive system comprises the product of the reaction of a cyclic urea and glyoxal in the equivalent ratio of about 1.1-1.5:1.
Claim 3
Dependent Claim
24 words
A formaldehye-free resin adhesive system for particleboard which comprises a cyclic urea:glyoxal condensate wherein the equivalent ratio of the cyclic urea:glyoxal is about 1.1-1.5.
Claim 4
Dependent Claim
24 words
A formaldehye-free resin adhesive system for particleboard which comprises a cyclic urea:glyoxal condensate wherein the equivalent ratio of the cyclic urea:glyoxal is about 1.1-1.5.
Claim 5
Dependent Claim
12 words
The condensate of claim 2 wherein the cyclic urea is ethylene urea.
Claim 6
Dependent Claim
15 words
The condensate of claim 2 wherein the equivalent ratio of cyclic urea:glyoxal is about 1.2-1.4:1.
Claim 7
Dependent Claim
14 words
The condensate of claim 2 wherein the equivalent ratio of cyclic urea:glyoxal is 1.3:1.
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) | 1986-07-25 | 1987-01-24 | 1987-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-25 | 1991-01-24 | 1991-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-25 | 1995-01-24 | 1995-07-26 | $7700.00 | Window Closed / Lapsed |