Patent US3254044A successfully refreshed from Google Patents.
US3254044A
Expired / Lapsed
US
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Aqueous vinylidene chloride polymer latexes and a process for preparing the same
Assignee: Dow Chemical Co
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Filing: 1961-06-05
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Granted: 1966-05-31
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Expires: 1981-06-05
Abstract
No abstract record available.
Inventors
- 👤 Roland E Gunderman
- 👤 Roland G Lindsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:10
CPC Classifications
C; C08; C08F; C08F259/00; C08F259/02; C08F259/06; C04; C04B; C04B24/00; C04B24/24; C04B24/26; C04B24/2682; C04B28/00; C04B28/02; Y; Y10; Y10S; Y10S525/00; Y10S525/902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
AN AQUEOUS LATEX WHEREIN SUBSTANTIALLY EACH INDIVIDUAL POLYMER PARTICLE IS COMPOSED OF (1) OF A CORE OF AN INTERPOLYMER OF AT LEAST 50 PERCENT BY WEIGHT OF VINYLIDENE CHLORIDE WITH THE REMAIDER OF AT LEAST ONE MONOETHYLENICALLY UNSATURATED COMONOMER AND (2) AN ENCOMPASSING SHEATH COMPOSED ESSENTIALLY OF THE HOMOPOLYMER OF AN ALKYL ALKACRYLATE HAVING FROM 1 TO 4 CARBON ATOMS IN THE ALKYL GROUP, THE POLYMER OF SAID SHEATH CONSTITUTING FROM ABOUT 1 TO ABOUT 5 PERCENT OF THE COMBINED TOTAL WEIGHT OF POLYMER IN THE PARTICLE.
Claim 2
Dependent Claim
87 words
AN AQUEOUS LATEX WHEREIN SUBSTANTIALLY EACH INDIVIDUAL POLYMER PARTICLE IS COMPOSED OF (1) OF A CORE OF AN INTERPOLYMER OF AT LEAST 50 PERCENT BY WEIGHT OF VINYLIDENE CHLORIDE WITH THE REMAIDER OF AT LEAST ONE MONOETHYLENICALLY UNSATURATED COMONOMER AND (2) AN ENCOMPASSING SHEATH COMPOSED ESSENTIALLY OF THE HOMOPOLYMER OF AN ALKYL ALKACRYLATE HAVING FROM 1 TO 4 CARBON ATOMS IN THE ALKYL GROUP, THE POLYMER OF SAID SHEATH CONSTITUTING FROM ABOUT 1 TO ABOUT 5 PERCENT OF THE COMBINED TOTAL WEIGHT OF POLYMER IN THE PARTICLE.
References Cited (Backward Citations)
US2711400A
Cited
US2746944A
Cited
US2849419A
Cited
US2894927A
Cited
GB866895A
Cited
US3102050A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |