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Patent US3143518A successfully refreshed from Google Patents.
US3143518A
Expired / Lapsed
US
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Hot melt polyvinyl alcohol adhesive plasticized with propylene glycol
Assignee: United Resin Products Inc
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Filing: 1963-06-21
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Granted: 1964-08-04
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Expires: 1983-06-21
Abstract
No abstract record available.
Inventors
- 👤 Vincent M Smith
- 👤 Robert J Stirn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:00
CPC Classifications
C; C09; C09J; C09J129/00; C09J129/02; C09J129/04; C08; C08L; C08L2666/00; C08L2666/28; C08L2666/34; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2852; Y10T428/2878; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
62 words
A HOT MELT ADHESIVE APPLICALBE IN ANHYDROUS FORM TO PAPER AND REACTIVATED BY MOISTENING WITH WATER, SAID ADHESIVE CONSISTING ESSENTIALLY OF FROM 65 TO 75 PARTS OF POLYVINYL ALCOHOL HAVING A PARTIAL HYDROLYSIS VALUE OF FROM 72.9% TO 79.0% AND A MOLECULARR WEIGHT OF FROM ABOUT 9,000 TO ABOUT 12,000 AND FROM 35 TO 25 PARTS OF PROPYLENE GLYCOL, ALL BY WEIGHT.
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) | 1967-08-04 | 1968-02-03 | 1968-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-04 | 1972-02-03 | 1972-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-04 | 1976-02-03 | 1976-08-04 | $7700.00 | Window Closed / Lapsed |