US2701391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drying polyacrylates
Assignee: Wyeth Holdings LLC
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Filing: 1952-06-14
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Granted: 1955-02-08
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Expires: 1972-06-14
Abstract
No abstract record available.
Inventors
- 👤 John F Yost
- 👤 Iise B Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:59
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08J2333/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
A PROCESS WHICH COMPRISES MIXING AN AQUEOUS DISPERSION OF A REACTION PRODUCT HAVING A MOLECULAR WEIGHT ABOVE ABOUT 117,500 OF A MONOVALENT BASE WITH A DISSOCIATION CONSTANT NO SMALLER THAN 1.8X10-5 AND A POLYMER OF A COMPOUND OF THE GROUP CONSISTING OF ACRYLIC ACID, ACRYLONITRILE, ACRYLAMIDE AND LOWER ALKYL ACRYLATES, AT LEAST ABOUT 0.5 PART OF AN ESTER OF A POLYOXYALKYLENE COMPOUND HAVING A MOLECULAR WEIGHT BETWEEN 200 AND 4,000 AND A FATTY ACID CONTAINING FROM 8 TO 22 CARBON ATOMS PER ACYL CHAIN, AND BETWEEN 2 TO 20 PARTS OF AN INERT NONTACKY SOLID OF HIGH SORPTIVE POWER HAVING A COMPACTED DRY BULK DENSITY LESS THAN 30 POUNDS PER CUBIC FOOT AND A MEDIAN PARTICLE SIZE SMALLER THAN 12 MICRONS; DEPOSITING THE DISPERSION ON A MOVING SURFACE HEATED SUFFICIENTLY TO EVAPORATE THE SOLUTION TO SUBSTANTIAL DRYNESS, AND SCRAPING THE RESULTING SUBSTANTIALLY DRIED FILM OFF OF THE MOVING SURFACE WITH A BLADE.
Claim 2
Dependent Claim
152 words
A PROCESS WHICH COMPRISES MIXING AN AQUEOUS DISPERSION OF A REACTION PRODUCT HAVING A MOLECULAR WEIGHT ABOVE ABOUT 117,500 OF A MONOVALENT BASE WITH A DISSOCIATION CONSTANT NO SMALLER THAN 1.8X10-5 AND A POLYMER OF A COMPOUND OF THE GROUP CONSISTING OF ACRYLIC ACID, ACRYLONITRILE, ACRYLAMIDE AND LOWER ALKYL ACRYLATES, AT LEAST ABOUT 0.5 PART OF AN ESTER OF A POLYOXYALKYLENE COMPOUND HAVING A MOLECULAR WEIGHT BETWEEN 200 AND 4,000 AND A FATTY ACID CONTAINING FROM 8 TO 22 CARBON ATOMS PER ACYL CHAIN, AND BETWEEN 2 TO 20 PARTS OF AN INERT NONTACKY SOLID OF HIGH SORPTIVE POWER HAVING A COMPACTED DRY BULK DENSITY LESS THAN 30 POUNDS PER CUBIC FOOT AND A MEDIAN PARTICLE SIZE SMALLER THAN 12 MICRONS; DEPOSITING THE DISPERSION ON A MOVING SURFACE HEATED SUFFICIENTLY TO EVAPORATE THE SOLUTION TO SUBSTANTIAL DRYNESS, AND SCRAPING THE RESULTING SUBSTANTIALLY DRIED FILM OFF OF THE MOVING SURFACE WITH A BLADE.
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) | 1958-02-07 | 1958-08-09 | 1959-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-07 | 1962-08-09 | 1963-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-07 | 1966-08-09 | 1967-02-08 | $7700.00 | Window Closed / Lapsed |