US2533632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for reinforcing polymeric butadiene synthetic rubber with lignosulfonate
Assignee: Marathon Corp
•
Filing: 1947-08-04
•
Granted: 1950-12-12
•
Expires: 1967-08-04
Abstract
No abstract record available.
Inventors
- 👤 Salvesen Jorgen Richter
- 👤 William C Browning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:04
CPC Classifications
C; C08; C08L; C08L9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A PROCESS FOR PREPARING A COMPOSITION CONTAINTAINING A LIGNOSULFONATE COMPOUND AND A POLYMERIC BUTADIENE SYNTHETIC RUBBER WHICH COMPRISES THE STEPS OF CO-DISPERSING A LATEX OF A POLYMERIC BUTADIENE SYNTHETIC RUBBER WITH AN AQUEOUS SOLUTION OF A LIGNOSUFONATE COMPOUND PARTIALLY DESULFONATED BY ALKALINE HYDROLYSIS AND DIRECTLY DRYING THE RESULTING CO-DISPERSION TO PRODUCE A NON-STICKY EASILY-HANDLED POWDER.
Claim 2
Dependent Claim
55 words
A PROCESS FOR PREPARING A COMPOSITION CONTAINTAINING A LIGNOSULFONATE COMPOUND AND A POLYMERIC BUTADIENE SYNTHETIC RUBBER WHICH COMPRISES THE STEPS OF CO-DISPERSING A LATEX OF A POLYMERIC BUTADIENE SYNTHETIC RUBBER WITH AN AQUEOUS SOLUTION OF A LIGNOSUFONATE COMPOUND PARTIALLY DESULFONATED BY ALKALINE HYDROLYSIS AND DIRECTLY DRYING THE RESULTING CO-DISPERSION TO PRODUCE A NON-STICKY EASILY-HANDLED POWDER.
References Cited (Backward Citations)
US2371136A
Cited
US2441090A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-11 | 1954-06-12 | 1954-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-11 | 1958-06-12 | 1958-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-11 | 1962-06-12 | 1962-12-12 | $7700.00 | Window Closed / Lapsed |