US4786438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lignosulfonate/urea binder for particulate composites
Assignee: Georgia-Pacific LLC
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Filing: 1987-08-10
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Granted: 1988-11-22
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Expires: 2007-08-10
Abstract
Abstract A coherent particulate composite is formed by blending particulate material with a binder containing lignosulfonate and urea.
Inventors
- 👤 Kenneth A. E. Blackmore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:54
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/04; C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/528; C04B35/532; C09; C09J; C09J197/00; C09J197/005; C10; C10L; C10L5/00; C10L5/02; C10L5/06; C10L5/10; C10L5/14; C10L5/20; C08; C08L; C08L2666/00; C08L2666/28
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
32 words
A coherent particulate composite comprising a uniform mixture of particulate material and 5-30% by weight of a binder, said binder comprising approximately equal parts by weight of urea solids and lignosulfonate solids.
Claim 2
Dependent Claim
32 words
A coherent particulate composite comprising a uniform mixture of particulate material and 5-30% by weight of a binder, said binder comprising approximately equal parts by weight of urea solids and lignosulfonate solids.
Claim 3
Dependent Claim
12 words
The composite of claim 1 wherein the particulate material is powdered coal.
Claim 4
Dependent Claim
12 words
The composite of claim 1 wherein the particulate material is powdered coke.
Claim 5
Dependent Claim
12 words
The composite of claim 1 containing 7-20% by weight of said binder.
References Cited (Backward Citations)
US3725019A
Cited
US4587358A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-22 | 1992-05-23 | 1992-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-22 | 1996-05-23 | 1996-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-22 | 2000-05-23 | 2000-11-22 | $7700.00 | Window Closed / Lapsed |