Patent US3223538A successfully refreshed from Google Patents.
US3223538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foamed zirconia insulating material
Assignee: Aeronca Manufacturing Corp
•
Filing: 1962-02-07
•
Granted: 1965-12-14
•
Expires: 1982-02-07
Abstract
No abstract record available.
Inventors
- 👤 Robert E Wiegert
- 👤 Thomas J Byrne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:12
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/34; C04B28/342; C04B35/00; C04B35/01; C04B35/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A METHOD OF PRODUCING A FOAMED ZIRCONIA INSULATING MATERIAL COMPRISING THE STEPS OF PREPARING A MIXTURE CONSISTING ESSENTIALLY OF ABOUT 50-65 PARTS BY WEIGHT OF GRANULAR ZIRCONIA, ABOUT 20-25 PARTS GRANULAR CERIUM DIOXIDE, 0.05-1.0 PART POWDERED ALUMINUM METAL, ABOUT 8-14 PARTS WATER, AND ABOUT 10-20 PARTS PHOSPHORIC ACID IN 85% AQUEOUS SOLUTION, SAID ZIRCONIA, CERIUM DIOXIDE AND ALUMINUM METAL FIRST BEING MIXED, SAID WATER AND PHOSPHORIC ACID THEN BEING ADDED TO PRODUCE A FOAMING REACTION IN WHICH STEAM AND HYDROGEN ARE EVOLVED WHICH IMPART A LIGHT CELLULAR STRUCTURE TO THE REACTION MASS, THE HEAT OF REACTION THEREBY RELEASED RAPIDLY GELLING THE MASS SO THAT THE CELLULAR STRUCTURE IS PRESERVED, AND SUBJECT ING THE RESULTANT PRODUCT TO TEMPERATURES IN THE RANGE OF 200-800*F. FOR A PERIOD OF HOURS SUFFICIENT TO FURTHER HARDEN THE PRODUCT.
Claim 2
Independent Claim
133 words
A METHOD OF PRODUCING A FOAMED ZIRCONIA INSULATING MATERIAL COMPRISING THE STEPS OF PREPARING A MIXTURE CONSISTING ESSENTIALLY OF ABOUT 50-65 PARTS BY WEIGHT OF GRANULAR ZIRCONIA, ABOUT 20-25 PARTS GRANULAR CERIUM DIOXIDE, 0.05-1.0 PART POWDERED ALUMINUM METAL, ABOUT 8-14 PARTS WATER, AND ABOUT 10-20 PARTS PHOSPHORIC ACID IN 85% AQUEOUS SOLUTION, SAID ZIRCONIA, CERIUM DIOXIDE AND ALUMINUM METAL FIRST BEING MIXED, SAID WATER AND PHOSPHORIC ACID THEN BEING ADDED TO PRODUCE A FOAMING REACTION IN WHICH STEAM AND HYDROGEN ARE EVOLVED WHICH IMPART A LIGHT CELLULAR STRUCTURE TO THE REACTION MASS, THE HEAT OF REACTION THEREBY RELEASED RAPIDLY GELLING THE MASS SO THAT THE CELLULAR STRUCTURE IS PRESERVED, AND SUBJECT ING THE RESULTANT PRODUCT TO TEMPERATURES IN THE RANGE OF 200-800*F. FOR A PERIOD OF HOURS SUFFICIENT TO FURTHER HARDEN THE PRODUCT.
References Cited (Backward Citations)
US1470195A
Cited
US2341561A
Cited
US2533899A
Cited
US3002248A
Cited
US2852401A
Cited
US2966421A
Cited
US2992930A
Cited
US3050812A
Cited
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 |