US2580040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High viscosity dispersions of rubbery materials
Assignee: Patent and Licensing Corp
•
Filing: 1948-07-03
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Granted: 1951-12-25
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Expires: 1968-07-03
Abstract
No abstract record available.
Inventors
- 👤 Robert E Munsell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:06
CPC Classifications
C; C08; C08L; C08L21/00; C08L21/02; Y; Y10; Y10S; Y10S524/00; Y10S524/925; Y10S524/926
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A VISCOUS RUBBERY DISPERSION HAVING A VISCOSITY OF AT LEAST 10,000 CENTIPOISES AND COMPRISING A RUBBERY MATERIAL FROM THE GROUP CONSISTING OF NATURAL RUBBER, POLYMERIZED 2-CHLOROBUTADIENE-1,3 AND BUTADIENE STYRENE COPOLYMERS DISPERSED IN AN AQUEOUS MEDIUM, SAID DISPERSION CONSISTING PREDOMINANTLY OF SOLIDS, THE RUBBERY MATERIAL REPRESENTING THE MAJOR PROPORTION OF THE SOLIDS, AND CONTAINING FROM .5% TO 3% OF CASEIN AND FROM .1% TO .6% OF AN ALKALINE BUFFER SALT BASED ON THE WEIGHT OF THE RUBBERY MATERIAL AND BEING CHARACTERIZED BY GOOD VISCOSITY STABILITY, THE VISCOSITY OF SAID DISPERSION REMAINING SUBSTANTIALLY UNCHANGED OVER A PERIOD OF SEVERAL DAYS.
Claim 2
Dependent Claim
98 words
A VISCOUS RUBBERY DISPERSION HAVING A VISCOSITY OF AT LEAST 10,000 CENTIPOISES AND COMPRISING A RUBBERY MATERIAL FROM THE GROUP CONSISTING OF NATURAL RUBBER, POLYMERIZED 2-CHLOROBUTADIENE-1,3 AND BUTADIENE STYRENE COPOLYMERS DISPERSED IN AN AQUEOUS MEDIUM, SAID DISPERSION CONSISTING PREDOMINANTLY OF SOLIDS, THE RUBBERY MATERIAL REPRESENTING THE MAJOR PROPORTION OF THE SOLIDS, AND CONTAINING FROM .5% TO 3% OF CASEIN AND FROM .1% TO .6% OF AN ALKALINE BUFFER SALT BASED ON THE WEIGHT OF THE RUBBERY MATERIAL AND BEING CHARACTERIZED BY GOOD VISCOSITY STABILITY, THE VISCOSITY OF SAID DISPERSION REMAINING SUBSTANTIALLY UNCHANGED OVER A PERIOD OF SEVERAL DAYS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |