Patent US3923680A successfully refreshed from Google Patents.
US3923680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Agglomerated rubber chemicals
Assignee: Bayer AG
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Filing: 1972-08-31
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Granted: 1975-12-02
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Expires: 1992-08-31
Abstract
Abstract Object of the invention are granulates (agglomerates) of rubber chemicals having an average particle diameter of greater than 60 Mu and a process of their production, wherein a binder-free suspension is sprayed into a hot gas stream with an inlet temperature from about 150* to 350*C and an outlet temperature below 120*C. Agglomerated particles having a moisture content of less than 1 percent by weight and an average grain size of greater than about 60 Mu are thus produced.
Inventors
- 👤 Henning Roeder
- 👤 Gunter P Langner
- 👤 Bernd Scherhag
- 👤 Hans-Lothar Nickenig
- 👤 Rene Loix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:17
CPC Classifications
B; B01; B01J; B01J2/00; B01J2/02; B01J2/04; C; C08; C08K; C08K9/00; Y; Y10; Y10S; Y10S159/00; Y10S159/10; Y10T; Y10T428/00; Y10T428/29
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
A FREE-FLOWING, BINDER-FREE SOLID RUBBER CHEMICAL IN THE FROM OF A SMOOTH SURFACED SPHERICAL AGGLOMERATE OF INDIVIDUAL PARTICLES, SAID RUBBER CHEMICAL BEING AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF VULCANIZATION ACCELERATORS, VULCANIZATION RETARDERS, ANTIAGERS, ANTIOZONANTS, MASTICATING AGENTS, REGENERATING AGENTS AND MIXTURES THEREOF, SAID AGGLOMERATE OF INDIVIDUAL PARTICLES BEING PRODUCED BY THE AGGLOMERATION PROCESS OF ATOMIZING A BIBDER-FREE SUSPENSION OF AT LEAST ONE OF SAID RUBBER CHEMICALS HAVING A PUPURITY OF GREATER THAN 95 PERCENT AND AN AVERAGE DIAMETER OF LESS THAN 60U WITH A SLOIDS CONTENT OF FROM 5 TO 60 PERCENT BY WEIGHT AND A VISCOSITY OF FROM 0.5 TO 100 CP AT 20*C. INTO A HOT GAS STREAM WHICH HAS AN INLET TEMPERATURE OF FROM 150* TO 350*C. AND AN OUTLET TEMPERATURE BELOW 120*C, RECOVERING AND RETURNING PARTICLES WITH AN AVERAGE DIAMETER OF LESS THAN ABOUT 60U TO THE AGGLOMERATION PROCESS AND RECOVERING RESULTING AGGLOMERATED PARTICLES WITH A MOISTURE CONTENT OF LESS THAN 1 PERCENT BY WEIGHT AND AN AVERAGE DIAMETER FROM ABOUT 60U TO 500U.
Claim 2
Dependent Claim
171 words
A FREE-FLOWING, BINDER-FREE SOLID RUBBER CHEMICAL IN THE FROM OF A SMOOTH SURFACED SPHERICAL AGGLOMERATE OF INDIVIDUAL PARTICLES, SAID RUBBER CHEMICAL BEING AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF VULCANIZATION ACCELERATORS, VULCANIZATION RETARDERS, ANTIAGERS, ANTIOZONANTS, MASTICATING AGENTS, REGENERATING AGENTS AND MIXTURES THEREOF, SAID AGGLOMERATE OF INDIVIDUAL PARTICLES BEING PRODUCED BY THE AGGLOMERATION PROCESS OF ATOMIZING A BIBDER-FREE SUSPENSION OF AT LEAST ONE OF SAID RUBBER CHEMICALS HAVING A PUPURITY OF GREATER THAN 95 PERCENT AND AN AVERAGE DIAMETER OF LESS THAN 60U WITH A SLOIDS CONTENT OF FROM 5 TO 60 PERCENT BY WEIGHT AND A VISCOSITY OF FROM 0.5 TO 100 CP AT 20*C. INTO A HOT GAS STREAM WHICH HAS AN INLET TEMPERATURE OF FROM 150* TO 350*C. AND AN OUTLET TEMPERATURE BELOW 120*C, RECOVERING AND RETURNING PARTICLES WITH AN AVERAGE DIAMETER OF LESS THAN ABOUT 60U TO THE AGGLOMERATION PROCESS AND RECOVERING RESULTING AGGLOMERATED PARTICLES WITH A MOISTURE CONTENT OF LESS THAN 1 PERCENT BY WEIGHT AND AN AVERAGE DIAMETER FROM ABOUT 60U TO 500U.
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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) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |