US3213051A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyvinyl acetate and polyvinyl alcohol adhesives
Assignee: Hexion Inc
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Filing: 1961-06-21
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Granted: 1965-10-19
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Expires: 1981-06-21
Abstract
No abstract record available.
Inventors
- 👤 Pierce Andrew Earl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:54
CPC Classifications
C; C09; C09J; C09J129/00; C09J129/02; C09J129/04; C09J131/00; C09J131/02; C09J131/04; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/04; C08L2666/28; C08L2666/54; C08L29/00; C08L29/02; C08L29/04; C08L31/00; C08L31/02; C08L31/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
AN ADHESIVE EMULSION CHARACTERIZED BY DEVELOPING TACKINESS IN FILM FORM WHILE WET AND BEING NON-GELLING ON AGEING, CONSISTING ESSENTIALLY OF AN AQUEOUS DISPERSION OF POLYVINYL ACETATE, POLYVINYL ALCOHOL, BORIC ACID AS SETTING AGENT FOR THE ADHESIVE, A RETARDER OF PREMATURE GELATION OF THE DISPERSION SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL AND AMMONIUM THIOCYANATES AND UREA, THE PH OF THE EMULSION BEING APPROXIMATELY WITHIN THE RANGE 2-6 AND THE SAID RETARDER AND BORIC ACID BEING IN THE PROPORTIONS BY WEIGHT OF 25-900 PARTS AND 15-100 PARTS, RESPECTIVELY, FOR 100 PARTS OF POLYVINYL ALCOHOL.
Claim 2
Dependent Claim
94 words
AN ADHESIVE EMULSION CHARACTERIZED BY DEVELOPING TACKINESS IN FILM FORM WHILE WET AND BEING NON-GELLING ON AGEING, CONSISTING ESSENTIALLY OF AN AQUEOUS DISPERSION OF POLYVINYL ACETATE, POLYVINYL ALCOHOL, BORIC ACID AS SETTING AGENT FOR THE ADHESIVE, A RETARDER OF PREMATURE GELATION OF THE DISPERSION SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL AND AMMONIUM THIOCYANATES AND UREA, THE PH OF THE EMULSION BEING APPROXIMATELY WITHIN THE RANGE 2-6 AND THE SAID RETARDER AND BORIC ACID BEING IN THE PROPORTIONS BY WEIGHT OF 25-900 PARTS AND 15-100 PARTS, RESPECTIVELY, FOR 100 PARTS OF POLYVINYL ALCOHOL.
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) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |