US2977206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicon carbide abrading wheels
Assignee: Chicago Wheel and Manufacturing Co
•
Filing: 1958-07-30
•
Granted: 1961-03-28
•
Expires: 1978-07-30
Abstract
No abstract record available.
Inventors
- 👤 Vernal L Sheets
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:30
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/02; B24D3/04; B24D3/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A SILICON CARBIDE ABRADING MATERIAL COMPRISING SILICON CARBIDE PARTICLES BONDED BY A VITRIFIED CERAMIC BINDER CONSISTING ESSENTIALLY OF THE FOLLOWING COMPOSITION APPROXIMATELY IN THE PROPORTIONS SET FORTH, NAMELY: MATERIAL: PARTS BY WEIGHT FELDSPAR ------------------------------15-40 FLINT-----------------------------14-40 -------------------------------20-50 LITHIUM-MANGANITE --------------------1-5 LITHIUM-BOROSILICATE GLASS---------------1-10 MOLYBDENUM-----------------------0.05-6
Claim 2
Dependent Claim
41 words
A SILICON CARBIDE ABRADING MATERIAL COMPRISING SILICON CARBIDE PARTICLES BONDED BY A VITRIFIED CERAMIC BINDER CONSISTING ESSENTIALLY OF THE FOLLOWING COMPOSITION APPROXIMATELY IN THE PROPORTIONS SET FORTH, NAMELY: MATERIAL: PARTS BY WEIGHT FELDSPAR ------------------------------15-40 FLINT-----------------------------14-40 -------------------------------20-50 LITHIUM-MANGANITE --------------------1-5 LITHIUM-BOROSILICATE GLASS---------------1-10 MOLYBDENUM-----------------------0.05-6
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) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |