Patent US3240560A successfully refreshed from Google Patents.
US3240560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making gamma-alumina fibers
Assignee: Corning Glass Works
•
Filing: 1962-10-25
•
Granted: 1966-03-15
•
Expires: 1982-10-25
Abstract
No abstract record available.
Inventors
- 👤 Carl D Spear
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:12
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/62227; C04B35/62231; C04B35/62236; Y; Y10; Y10S; Y10S264/00; Y10S264/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A METHOD OF MAKING LONG FIBERS OF GAMMA-ALUMINA COMPRISING REACTING ALUMINUM METAL IN A CLOSED SYSTEM WITH A MIXTURE OF ABOUT 90-99,75 WEIGHT PERCENT OF AT LEAST ONE METAL OXIDE WHICH HAS A MORE POSITIVE FREE ENERGY OF FORMATION THANALUMINUM OXIDE AND ABOUT 0.25-10 WEIGHT PERCENT OF A PROMOTER COMPRISING AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF POTASSIUM, RUBIDIUM, CESIUM, THEIR RESPECTIVE OXIDES, AND COMPOUNDS THEREOF THERMALLY DECOMPOSABLE TO THE CORRESPONDING OXIDE AT ABOUT 700*-1000*C. FOR A PERIOD OF TIME SUFFICIENT TO ATTAIN THE DESIRED FIBER FORMATION.
Claim 2
Independent Claim
89 words
A METHOD OF MAKING LONG FIBERS OF GAMMA-ALUMINA COMPRISING REACTING ALUMINUM METAL IN A CLOSED SYSTEM WITH A MIXTURE OF ABOUT 90-99,75 WEIGHT PERCENT OF AT LEAST ONE METAL OXIDE WHICH HAS A MORE POSITIVE FREE ENERGY OF FORMATION THANALUMINUM OXIDE AND ABOUT 0.25-10 WEIGHT PERCENT OF A PROMOTER COMPRISING AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF POTASSIUM, RUBIDIUM, CESIUM, THEIR RESPECTIVE OXIDES, AND COMPOUNDS THEREOF THERMALLY DECOMPOSABLE TO THE CORRESPONDING OXIDE AT ABOUT 700*-1000*C. FOR A PERIOD OF TIME SUFFICIENT TO ATTAIN THE DESIRED FIBER FORMATION.
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) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |