US3321271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthesis of aluminum silicate whiskers
Assignee: Individual
•
Filing: 1965-02-02
•
Granted: 1967-05-23
•
Expires: 1985-02-02
Abstract
No abstract record available.
Inventors
- 👤 Robert C Johnson
- 👤 Wilbur H Warwick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:34
CPC Classifications
C; C30; C30B; C30B25/00; C30B25/005; C30B29/00; C30B29/10; C30B29/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A PROCESS FOR PREPARATION OF ALUMINUM SILICATE WHISKERS COMPRISING REACTING AN ALUMINUM HALIDE IN THE VAPOR STATE WITH WATER VAPOR AND A SILICA MATERIAL FROM THE GROUP CONSISTING OF SILICA AND ALUMINUM SILICATE, THE REACTION BEING CARRIED OUT AT A TEMPERATURE OF FROM ABOUT 1000*C. TO ABOUT 1400*C.
Claim 2
Dependent Claim
48 words
A PROCESS FOR PREPARATION OF ALUMINUM SILICATE WHISKERS COMPRISING REACTING AN ALUMINUM HALIDE IN THE VAPOR STATE WITH WATER VAPOR AND A SILICA MATERIAL FROM THE GROUP CONSISTING OF SILICA AND ALUMINUM SILICATE, THE REACTION BEING CARRIED OUT AT A TEMPERATURE OF FROM ABOUT 1000*C. TO ABOUT 1400*C.
References Cited (Backward Citations)
US3080242A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-22 | 1970-11-21 | 1971-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-22 | 1974-11-21 | 1975-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-22 | 1978-11-21 | 1979-05-23 | $7700.00 | Window Closed / Lapsed |