US3313764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber compositions
Assignee: SEKAICHO GOMU KK
•
Filing: 1963-12-24
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Granted: 1967-04-11
•
Expires: 1983-12-24
Abstract
No abstract record available.
Inventors
- 👤 Iino Hirokazu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:52
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/24; C08J3/247; C08K; C08K9/00; C08J2321/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
METHOD OF PREPARING A RUBBER COMPOSITION, COMPRISING PREHEATING AT LEAST ONE SPECIES OF FILLERS AT A TEMPERATURE RANGING FROM 100*C. TO THE DECOMPOSING POINT OF THE FILLER EMPLOYED UNTIL EACH OF THE PARTICLES OF THE FILLER IS HEATED TO A TEMPERATURE SUBSTANTIALLY EQUAL TO THE HEAT APPLIED; AND MILLING A RUBBER STOCK IN ADMIXTURE WITH THE RESULTANT FILLER ADDED WHILE RETAINING A TEMPERATURE RANGING FROM 50*C. TO THE TEMPERATURE WHERE THE RUBBER CONTENT PRESENT IN THE RUBBER STOCK STARTS UNDERGOING CONVERSION IN QUALITY DUE TO THE HEAT OF THE FILLER ADDED.
Claim 2
Dependent Claim
91 words
METHOD OF PREPARING A RUBBER COMPOSITION, COMPRISING PREHEATING AT LEAST ONE SPECIES OF FILLERS AT A TEMPERATURE RANGING FROM 100*C. TO THE DECOMPOSING POINT OF THE FILLER EMPLOYED UNTIL EACH OF THE PARTICLES OF THE FILLER IS HEATED TO A TEMPERATURE SUBSTANTIALLY EQUAL TO THE HEAT APPLIED; AND MILLING A RUBBER STOCK IN ADMIXTURE WITH THE RESULTANT FILLER ADDED WHILE RETAINING A TEMPERATURE RANGING FROM 50*C. TO THE TEMPERATURE WHERE THE RUBBER CONTENT PRESENT IN THE RUBBER STOCK STARTS UNDERGOING CONVERSION IN QUALITY DUE TO THE HEAT OF THE FILLER ADDED.
References Cited (Backward Citations)
US3024092A
Cited
US2914503A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-04-10 | 1970-10-10 | 1971-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-10 | 1974-10-10 | 1975-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-10 | 1978-10-10 | 1979-04-11 | $7700.00 | Window Closed / Lapsed |