US2749248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organophilic titania powders containing a polymerizable ethylenic monomer bound to fractured surfaces thereof and their preparation
Assignee: EIDP Inc
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Filing: 1952-05-09
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Granted: 1956-06-05
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Expires: 1972-05-09
Abstract
No abstract record available.
Inventors
- 👤 Richard E Benson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:26
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/36; C09C1/3692; C09C3/00; C09C3/04; C09C3/041; C09C3/08; D; D06; D06M; D06M11/00; D06M11/32; D06M11/36; D06M11/46; H; H01; H01B; H01B3/00; C01; C01P; C01P2004/00; C01P2004/50; C01P2004/60; C01P2004/80; C01P2006/00; C01P2006/12; C01P2006/80; C01P2006/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A METHOD FOR PREPARING A FINELY DIVIDED TITANIA POWDER HAVING ORGANOPHILIC PROPERTIES WHICH COMPRISES GRINDING AND FRACTURING COARSE GRANULAR TITANIUM DIOXIDE HAVING A PARTICLE SIZE OFF AT LEAST 1 MM. AVERAGE DIAMETER IN CONTACT WITH A POLYMERIZABLE ETHYLENIC MONOMER CONTAINING FROM ONE TO TWO ETHYLENIC DOUBLE BONDS AS THE SOLE ALIPHATIC CARBON-TO-CARBON UNSATURATION, AND AT A TEMPERATURE BELOW THAT AT WHICH POLYMERIZATION OF SAID MONOMER OCCURS, THEREBY PROVIDING FRESHLY FRACTURED TITANIUM DIOXIDE SURFACES REACTIVE WITH SAID MONOMER, CONTINUING SAID GRINDING AND FRACTURING OF THE COARSE GRANULAR TITANIUM DIOXIDE IN CONTACT WITH SAID MONOMER UNTIL THE TITANIUM DIOXIDE PARTICLES ARE GROUND TO A FINE POWDER HAVING A SURFACE AREA OF AT LEAST 0.1 M.Z/G. AND SAID MONOMER BECOMES BONDED TO ACTIVE FRACTURED SURFACE THEREOF, AND SEPARATING AS THE RESULTING PRODUCT A FINELY DIVIDED TITANIA POWDER CONTAINING SAID MONOMER BONDED TO FRACTURED SURFACES THEREOF AND HAVING ORGANOPHILIC PROPERTIES.
Claim 2
Independent Claim
146 words
A METHOD FOR PREPARING A FINELY DIVIDED TITANIA POWDER HAVING ORGANOPHILIC PROPERTIES WHICH COMPRISES GRINDING AND FRACTURING COARSE GRANULAR TITANIUM DIOXIDE HAVING A PARTICLE SIZE OFF AT LEAST 1 MM. AVERAGE DIAMETER IN CONTACT WITH A POLYMERIZABLE ETHYLENIC MONOMER CONTAINING FROM ONE TO TWO ETHYLENIC DOUBLE BONDS AS THE SOLE ALIPHATIC CARBON-TO-CARBON UNSATURATION, AND AT A TEMPERATURE BELOW THAT AT WHICH POLYMERIZATION OF SAID MONOMER OCCURS, THEREBY PROVIDING FRESHLY FRACTURED TITANIUM DIOXIDE SURFACES REACTIVE WITH SAID MONOMER, CONTINUING SAID GRINDING AND FRACTURING OF THE COARSE GRANULAR TITANIUM DIOXIDE IN CONTACT WITH SAID MONOMER UNTIL THE TITANIUM DIOXIDE PARTICLES ARE GROUND TO A FINE POWDER HAVING A SURFACE AREA OF AT LEAST 0.1 M.Z/G. AND SAID MONOMER BECOMES BONDED TO ACTIVE FRACTURED SURFACE THEREOF, AND SEPARATING AS THE RESULTING PRODUCT A FINELY DIVIDED TITANIA POWDER CONTAINING SAID MONOMER BONDED TO FRACTURED SURFACES THEREOF AND HAVING ORGANOPHILIC PROPERTIES.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |