US2930770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of cellular polyvinyl resins
Assignee: Metal Hydrides Inc
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Filing: 1957-03-18
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Granted: 1960-03-29
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Expires: 1977-03-18
Abstract
No abstract record available.
Inventors
- 👤 Robert C Wade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:48
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/065; C08J2357/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
THE METHOD OF PREPARING CELLULAR PRODUCTS WHICH COMPRISES CONVERTING A LIQUID MASS HAVING A CONSISTENCY OF ABOUT THAT OF ORDINARY PAINT AND PH VALUE BETWEEN ABOUT 7.0 AND 8.0 AND SELECTED FROM THE GROUP CONSISTING OF A WATER EMULSION OF POLYVINYL ACETATE AND A SOLUTION OF POLYVINYL ALCOHOL IN WATER AND MIXTURES THEREOF TO A GEL BY MIXING THEREWITH A CONCENTRATED SOLUTION OF AN ALKALI METAL BOROHYDRIDE, THE AMOUNT OF ALKALI METAL BOROHYDRIDE USED BEING FROM 0.1 TO 0.5 PART FOR EACH 100 PARTS OF SAID LIQUID MASS BY WEIGHT, THEN CAUSING THE WATER TO REACT WITH THE ALKALI METAL BORHYDRIDE IN THE GEL BY HEATING THE LATTER AT A TEMPERATURE BETWEEN ROOM TEMPERATURE AND 125*C. THEREBY GENERATING HYDROGEN GAS WITHIN THE GEL TO RENDER THE LATTER CELLULAR, AND THEREAFTER CONTINUING SAID HEATING UNTIL THE CELLULAR MASS IS DRY.
Claim 2
Independent Claim
139 words
THE METHOD OF PREPARING CELLULAR PRODUCTS WHICH COMPRISES CONVERTING A LIQUID MASS HAVING A CONSISTENCY OF ABOUT THAT OF ORDINARY PAINT AND PH VALUE BETWEEN ABOUT 7.0 AND 8.0 AND SELECTED FROM THE GROUP CONSISTING OF A WATER EMULSION OF POLYVINYL ACETATE AND A SOLUTION OF POLYVINYL ALCOHOL IN WATER AND MIXTURES THEREOF TO A GEL BY MIXING THEREWITH A CONCENTRATED SOLUTION OF AN ALKALI METAL BOROHYDRIDE, THE AMOUNT OF ALKALI METAL BOROHYDRIDE USED BEING FROM 0.1 TO 0.5 PART FOR EACH 100 PARTS OF SAID LIQUID MASS BY WEIGHT, THEN CAUSING THE WATER TO REACT WITH THE ALKALI METAL BORHYDRIDE IN THE GEL BY HEATING THE LATTER AT A TEMPERATURE BETWEEN ROOM TEMPERATURE AND 125*C. THEREBY GENERATING HYDROGEN GAS WITHIN THE GEL TO RENDER THE LATTER CELLULAR, AND THEREAFTER CONTINUING SAID HEATING UNTIL THE CELLULAR MASS IS DRY.
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) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |