Patent US5711958A successfully refreshed from Google Patents.
US2806012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vulcanized rubber-silica composition
Assignee: Columbia Southern Chemical Corp
•
Filing: 1957-03-28
•
Granted: 1957-09-10
•
Expires: 1977-03-28
Abstract
No abstract record available.
Inventors
- 👤 Edward M Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:58
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/113; C01B33/12; C01B33/18; B; B82; B82Y; B82Y30/00; C01B33/187; C01B33/193; C08; C08K; C08K3/00; C08K3/34; C08K3/36; C09; C09C; C09C1/00; C09C1/28; C09C1/30; C09C1/3045; C01P; C01P2002/00; C01P2002/50; C01P2002/52; C01P2004/00; C01P2004/01; C01P2004/03; C01P2004/50; C01P2004/60; C01P2004/64; C01P2006/00; C01P2006/10; C01P2006/12; C01P2006/80; C01P2006/82; C01P2006/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
VULCANIZED COMPOSITION CONTAINING A RUBBER OF THE GROUP CONSISTING OF NATURAL RUBBER AND SYNTHETIC RUBBERY POLYMERS OF CONJUGATED DIENES AND HAVING DISPERSED THEREIN FROM ABOUT 5 TO 100 PARTS BY WEIGHT OF A FINELY DIVIDED SILICA PIGMENT TO ABOUT 100 PARTS BY WEIGHT OF SAID RUBBER, SAID FINELY DIVIDED SILICA PIGMENT CONTAINING AT LEAST 90 PERCENT BY WEIGHT OF SIO2 MEASURED ON THE ANHYDROUS BASIS, BOUND WATER IN THE PROPORTION OF ONE MOLE OF WATER PER 3 TO 9 MOLES OF SIO2, THE FREE WATER CONTENT OF SAID PIGMENT BEING UP TO 10 PERCENT BY WEIGHT; SAID PIGMENT BEING IN THE FORM OF POROUS FLOCS AND HAVING A SURFACE AREA OF 60 TO 200 SQUARE METERS PER GRAM AND AN AVERAGE ULTIMATE PARTICLE SIZE OF 0.015 TO 0.05 MICRON.
Claim 2
Dependent Claim
129 words
VULCANIZED COMPOSITION CONTAINING A RUBBER OF THE GROUP CONSISTING OF NATURAL RUBBER AND SYNTHETIC RUBBERY POLYMERS OF CONJUGATED DIENES AND HAVING DISPERSED THEREIN FROM ABOUT 5 TO 100 PARTS BY WEIGHT OF A FINELY DIVIDED SILICA PIGMENT TO ABOUT 100 PARTS BY WEIGHT OF SAID RUBBER, SAID FINELY DIVIDED SILICA PIGMENT CONTAINING AT LEAST 90 PERCENT BY WEIGHT OF SIO2 MEASURED ON THE ANHYDROUS BASIS, BOUND WATER IN THE PROPORTION OF ONE MOLE OF WATER PER 3 TO 9 MOLES OF SIO2, THE FREE WATER CONTENT OF SAID PIGMENT BEING UP TO 10 PERCENT BY WEIGHT; SAID PIGMENT BEING IN THE FORM OF POROUS FLOCS AND HAVING A SURFACE AREA OF 60 TO 200 SQUARE METERS PER GRAM AND AN AVERAGE ULTIMATE PARTICLE SIZE OF 0.015 TO 0.05 MICRON.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |