US2608537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lignin reinforced rubber and method of making same
Assignee: West Virginia Pulp and Paper Co
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Filing: 1947-07-12
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Granted: 1952-08-26
•
Expires: 1967-07-12
Abstract
No abstract record available.
Inventors
- 👤 Pollak Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:14
CPC Classifications
C; C08; C08L; C08L9/00; C08L9/02; C08L9/04; C08L11/00; C08L11/02; C08L21/00; C08L7/00; C08L7/02; C08L9/06; C08L9/08; C08L97/00; C08L97/005; Y; Y10; Y10S; Y10S524/00; Y10S524/925
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
58 words
THE METHOD OF MAKING A REINFORCED ELASTOMER WHICH COMPRISES MIXING AQUEOUS ALKALI LIGNATE AND A LATEX OF A POLYMERIC BUTADIENE RUBBER, COPRECIPITATING THE RUBBER AND LIGNIN TO PRODUCE A COAGULUM CONTAINING THE RUBBER AND LIGNIN, DRYING THE COAGULUM, MASTICATING AND SOFTENING AND EFFECTING BREAKDOWN OF THE SAME THEREBY FORMING A REINFORCED ELASTOMER HAVING THE LIGNIN SUBSTANTIALLY UNIFORMLY DISPERSED
References Cited (Backward Citations)
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Cited
US2195380A
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US2343368A
Cited
US2355180A
Cited
US2353568A
Cited
US2381248A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-26 | 1956-02-25 | 1956-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-26 | 1960-02-25 | 1960-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-26 | 1964-02-25 | 1964-08-26 | $7700.00 | Window Closed / Lapsed |