US3379664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous dispersions of polymeric materials
Assignee: Dow Chemical Co
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Filing: 1964-04-20
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Granted: 1968-04-23
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Expires: 1984-04-20
Abstract
No abstract record available.
Inventors
- 👤 Ralph M Wiley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:03
CPC Classifications
C; C08; C08F; C08F12/00; C08F12/02; C08F12/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
98 words
AN AQUEOUS DISPERSION OF POLYMERIC MICROSPHERES HAVING AN AVERAGE DIAMETER OF FROM ABOUT 3 MICRONS TO ABOUT 40 MICRONS HAVING A REDUCED TENDENCY TO CREAMING OR SETTLING, SAID POLYMERIC MICROSPHERES CONSISTING ESSENTIALLY OF THE POLYMERIZATION PRODUCT OF FROM ABOUT 65 PERCENT TO ABOUT 85 PERCENT BY WEIGHT OF MONOMERIC CONSTITUENTS HAVING DISSOLVED THEREIN FROM ABOUT 15 PERCENT TO ABOUT 35 PERCENT BY WEIGHT OF A WAX HAVING A SPECIFIC GRAVITY OF LESS THAN ABOUT 0.95 AND CONSISTING ESSENTIALLY OF HYDROCARBON SUBSTANCES, SAID MONOMERIC CONSTITUENTS CONSISTING OF AT LEAST 80 PERCENT BY WEIGHT OF A MONOMER HAVING THE FORMULA
Claim 2
Dependent Claim
98 words
AN AQUEOUS DISPERSION OF POLYMERIC MICROSPHERES HAVING AN AVERAGE DIAMETER OF FROM ABOUT 3 MICRONS TO ABOUT 40 MICRONS HAVING A REDUCED TENDENCY TO CREAMING OR SETTLING, SAID POLYMERIC MICROSPHERES CONSISTING ESSENTIALLY OF THE POLYMERIZATION PRODUCT OF FROM ABOUT 65 PERCENT TO ABOUT 85 PERCENT BY WEIGHT OF MONOMERIC CONSTITUENTS HAVING DISSOLVED THEREIN FROM ABOUT 15 PERCENT TO ABOUT 35 PERCENT BY WEIGHT OF A WAX HAVING A SPECIFIC GRAVITY OF LESS THAN ABOUT 0.95 AND CONSISTING ESSENTIALLY OF HYDROCARBON SUBSTANCES, SAID MONOMERIC CONSTITUENTS CONSISTING OF AT LEAST 80 PERCENT BY WEIGHT OF A MONOMER HAVING THE FORMULA
Claim 3
Dependent Claim
93 words
A PROCESS FOR PREPARING AN AQUEOUS DISPERSION OF POLYMERIC MICROSPHERES HAVING AN AVERAGE DIAMETER OF FROM ABOUT 3 MICRONS TO ABOUT 40 MICRONS AND HAVING A REDUCED TENDENCY TO CREAMING OR SETTLING BY THE STEPS OF (1) PREPARING A SOLUTION OF FROM ABOUT 15 PERCENT TO ABOUT 35 PERCENT BY WEIGHT OF A WAX HAVING A SPECIFIC GRAVITY LESS THAN ABOUT 0.95 IN FROM ABOUT 65 PERCENT TO ABOUT 85 PERCENT BY WEIGHT OF A MONOMER COMPOSITION CONSISTING ESSENTIALLY OF (A) AT LEAST 80 PERCENT BY WEIGHT OF A MONOMER HAVING THE FORMULA
Claim 4
Dependent Claim
93 words
A PROCESS FOR PREPARING AN AQUEOUS DISPERSION OF POLYMERIC MICROSPHERES HAVING AN AVERAGE DIAMETER OF FROM ABOUT 3 MICRONS TO ABOUT 40 MICRONS AND HAVING A REDUCED TENDENCY TO CREAMING OR SETTLING BY THE STEPS OF (1) PREPARING A SOLUTION OF FROM ABOUT 15 PERCENT TO ABOUT 35 PERCENT BY WEIGHT OF A WAX HAVING A SPECIFIC GRAVITY LESS THAN ABOUT 0.95 IN FROM ABOUT 65 PERCENT TO ABOUT 85 PERCENT BY WEIGHT OF A MONOMER COMPOSITION CONSISTING ESSENTIALLY OF (A) AT LEAST 80 PERCENT BY WEIGHT OF A MONOMER HAVING THE FORMULA
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) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |