US3138468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tetraboronsilicide
Assignee: Allis Chalmers Corp
•
Filing: 1959-06-17
•
Granted: 1964-06-23
•
Expires: 1979-06-17
Abstract
No abstract record available.
Inventors
- 👤 Vlado I Matkovich
- 👤 Colton Ervin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:29
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
1 words
TETRABORONSILICIDE.
Claim 2
Dependent Claim
1 words
TETRABORONSILICIDE.
Claim 3
Dependent Claim
24 words
A COMPOSITION OF MATTER CONTAINING A BORON SILICEDE COMPOUND CONFORMING TO THE FORMULA B4SI AND FREE SILICON IN QUANTITIES UP TO ABOUT 25 PERCENT.
Claim 4
Dependent Claim
24 words
A COMPOSITION OF MATTER CONTAINING A BORON SILICEDE COMPOUND CONFORMING TO THE FORMULA B4SI AND FREE SILICON IN QUANTITIES UP TO ABOUT 25 PERCENT.
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) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |