US3223537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing foamed insulating material
Assignee: Aeronca Manufacturing Corp
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Filing: 1962-01-15
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Granted: 1965-12-14
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Expires: 1982-01-15
Abstract
No abstract record available.
Inventors
- 👤 Robert E Wiegert
- 👤 Thomas J Byrne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:12
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/34; C04B28/342
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
THE METHOD WHICH COMPRISES, FORMING A MIXTURE CONSISTING ESSENTIALLY OF ABOUT 25-31 PARTS BY WEIGHT GRANULAR ALUMINA (AL2O3), ABOUT 30-40 PARTS GRANULAR ALUMINUM HYDROXIDE, ABOUT 0.01-0.1 PART OF A POWDERED HYDROGEN DISPLACING METAL, PHOSPHORIC ACID IN AN AMOUNT EQUIVALENT TO ABOUT 22-27 PARTS OF 85% PHOSPHORIC ACID AQUEOUS SOLUTION, AND ABOUT 8-14 PARTS WATER, SAID ALUMINA, HYDROXIDE, METAL, AND WATER FIRST BEING MIXED, SAID PHOSPHORIC ACID THEREAFTER BEING ADDED AND PRODUCING A FOAMING REACTION BETWEEN SAID ACID AND SAID ALUMINA, HYDROXIDE, AND METAL IN WHICH STEAM AND HYDROGEN ARE EVOLVED AND IMPART A LIGHT CELLULAR STRUCTURE TO A REACTION MASS, CASTING THE REACTION MASS IN A FORM AND PERMITTING SAID MASS TO SET WITHOUT THE APPLICATION OF HEAT ADDITIONAL TO THAT PRODUCED BY THE REACTION, SAID SETTING BEING SUBSTANTIALLY COMPLETE WITHIN A PERIOD LESS THAN ABOUT ONE HOUR, AND CURING THE SET MASS BY HEATING TO THE RANGE OF ABOUT 200-600*F.
Claim 2
Independent Claim
151 words
THE METHOD WHICH COMPRISES, FORMING A MIXTURE CONSISTING ESSENTIALLY OF ABOUT 25-31 PARTS BY WEIGHT GRANULAR ALUMINA (AL2O3), ABOUT 30-40 PARTS GRANULAR ALUMINUM HYDROXIDE, ABOUT 0.01-0.1 PART OF A POWDERED HYDROGEN DISPLACING METAL, PHOSPHORIC ACID IN AN AMOUNT EQUIVALENT TO ABOUT 22-27 PARTS OF 85% PHOSPHORIC ACID AQUEOUS SOLUTION, AND ABOUT 8-14 PARTS WATER, SAID ALUMINA, HYDROXIDE, METAL, AND WATER FIRST BEING MIXED, SAID PHOSPHORIC ACID THEREAFTER BEING ADDED AND PRODUCING A FOAMING REACTION BETWEEN SAID ACID AND SAID ALUMINA, HYDROXIDE, AND METAL IN WHICH STEAM AND HYDROGEN ARE EVOLVED AND IMPART A LIGHT CELLULAR STRUCTURE TO A REACTION MASS, CASTING THE REACTION MASS IN A FORM AND PERMITTING SAID MASS TO SET WITHOUT THE APPLICATION OF HEAT ADDITIONAL TO THAT PRODUCED BY THE REACTION, SAID SETTING BEING SUBSTANTIALLY COMPLETE WITHIN A PERIOD LESS THAN ABOUT ONE HOUR, AND CURING THE SET MASS BY HEATING TO THE RANGE OF ABOUT 200-600*F.
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) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |