US3875302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gelled vinyl alcohol polymers and articles therefrom
Assignee: Kuraray Co Ltd
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Filing: 1973-08-07
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Granted: 1975-04-01
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Expires: 1993-08-07
Abstract
Abstract A process is provided for preparing gelled vinyl alcohol polymers comprising freezing an aqueous solution of a vinyl alcohol polymer below about -5*C., and thereafter melting the frozen solution. Articles such as artificial bait prepared from said gelled vinyl alcohol polymers are also provided.
Inventors
- 👤 Taisei Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:56
CPC Classifications
C; C05; C05G; C05G5/00; C05G5/40; A; A01; A01C; A01C21/00; A01K; A01K97/00; A01K97/04; A01K97/045; B; B01; B01J; B01J13/00; B01J13/0052; B01J13/0065; B01J2/00; B01J2/02; B01J2/06; B01J2/08; C08; C08K; C08K5/00; C08K5/0008; C08L; C08L29/00; C08L29/02; C08L29/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
129 words
A GELLED POLYVINYL ALCOHOL POLYMER HAVING A DEGREE OF POLYMERIZATION OF BETWEEN ABOUT 500 AND 2000 AND CONTAINING A FISH ATTRACTANT, SAID GELLED POLYVINYL ALCOHOL POLYMER HAVING A RATIO OF WATER CONTENT TO SOLIDS CONTENT SIMILAR TO RAW FISH BAIT AND A FLEXIBLE AND SOFTNESS SIMILAR TO RAW FISH BAIT AND EXHIBITING RETARDED LEACHING OF SAID FISH ATTRACTANT, SAID GELLED POLYVINYL ALCOHOL POLYMER PREPARED BY A PROCESS COMPRISING ADMIXING SAID FISH ATTRACTANT WITH AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF WATER AND FROM ABOUT 5 TO ABOUT 40 WT % OF A VINYL ALCOHOL POLYMER FREEZING SAID ADMIXTURE AT A TEMPERATURE BELOW ABOUT -5*C FOR A PERIOD OF FROM ABOUT 10 TO ABOUT 50 HOURS, AND MELTING THE RESULTING FROZEN SOLUTION TO OBTAIN SAID FISH ATTRACTANT-CONTAINING GELLED POLYVINYL ALCOHOL POLYMER.
Claim 2
Dependent Claim
129 words
A GELLED POLYVINYL ALCOHOL POLYMER HAVING A DEGREE OF POLYMERIZATION OF BETWEEN ABOUT 500 AND 2000 AND CONTAINING A FISH ATTRACTANT, SAID GELLED POLYVINYL ALCOHOL POLYMER HAVING A RATIO OF WATER CONTENT TO SOLIDS CONTENT SIMILAR TO RAW FISH BAIT AND A FLEXIBLE AND SOFTNESS SIMILAR TO RAW FISH BAIT AND EXHIBITING RETARDED LEACHING OF SAID FISH ATTRACTANT, SAID GELLED POLYVINYL ALCOHOL POLYMER PREPARED BY A PROCESS COMPRISING ADMIXING SAID FISH ATTRACTANT WITH AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF WATER AND FROM ABOUT 5 TO ABOUT 40 WT % OF A VINYL ALCOHOL POLYMER FREEZING SAID ADMIXTURE AT A TEMPERATURE BELOW ABOUT -5*C FOR A PERIOD OF FROM ABOUT 10 TO ABOUT 50 HOURS, AND MELTING THE RESULTING FROZEN SOLUTION TO OBTAIN SAID FISH ATTRACTANT-CONTAINING GELLED POLYVINYL ALCOHOL POLYMER.
Claim 3
Dependent Claim
22 words
A gelled polyvinyl alcohol polymer as defined in claim 1 wherein the aqueous solution is frozen at a temperature below about -15*C.
Claim 4
Dependent Claim
24 words
A gelled polyvinyl alcohol polymer as defined in claim 2 wherein the aqueous solution is frozen at a temperature of from -15*C. to -50*C.
Claim 5
Dependent Claim
27 words
A gelled polyvinyl alcohol polymer as defined in claim 1 wherein, after the frozen solution is melted, it is at least once again frozen and then melted.
Claim 6
Dependent Claim
124 words
The gelled polyvinyl alcohol polymer of claim 1 wherein globules of said polymer are formed by a process comprising intermittently adding an admixture of fish attractant and an aqueous solution consisting essentially of water and from about 5 to 40 wt.% of a vinyl alcohol polymer to a liquid non-solvent for the vinyl alcohol polymer which is substantially incompatible with water, said liquid non-solvent exhibiting a specific gravity which is equal to or less than that of the aqueous solution of the vinyl alcohol polymer, whereby the aqueous solution of vinyl alcohol polymer assumes a globular form, freezing the admixture in said liquid non-solvent at a temperature below about -5*C., and melting the resultant frozen mixture to obtain globules of gelled vinyl alcohol polymer.
Claim 7
Dependent Claim
23 words
A gelled polyvinyl alcohol polymer as defined in claim 1 which additionally contains a colorant, said colorant being admixed with the aqueous solution.
Claim 8
Dependent Claim
27 words
A gelled polyvinyl alcohol polymer as defined in claim 1 which additionally contains reinforcing fibers or fabric, said fibers or fabric being admixed with the aqueous solution.
Claim 9
Dependent Claim
99 words
A process of manufacturing a hydrophilic fishing bait having a ratio of water content to solid content similar to raw bait and a flexibility and softness similar to raw bait, and a retarded leaching characteristic, comprising the steps of forming an aqueous mixture of from about 5 to 40 wt.% of a polyvinyl alcohol having a degree of polymerization between about 500 and 2000 and a fish attractant, freezing said mixture at a temperature below about -5*C. for a period of from about 10 to about 50 hours, and melting the frozen mixture to obtain said hydrophilic fishing bait.
Claim 10
Dependent Claim
99 words
A process of manufacturing a hydrophilic fishing bait having a ratio of water content to solid content similar to raw bait and a flexibility and softness similar to raw bait, and a retarded leaching characteristic, comprising the steps of forming an aqueous mixture of from about 5 to 40 wt.% of a polyvinyl alcohol having a degree of polymerization between about 500 and 2000 and a fish attractant, freezing said mixture at a temperature below about -5*C. for a period of from about 10 to about 50 hours, and melting the frozen mixture to obtain said hydrophilic fishing bait.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |