US3010835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lightweight refractory castable and method of manufacture
Assignee: AP Green Fire Brick Co
•
Filing: 1958-09-22
•
Granted: 1961-11-28
•
Expires: 1978-09-22
Abstract
No abstract record available.
Inventors
- 👤 Glen W Charles
- 👤 Albert R Lesar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:42
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/06; Y; Y10; Y10S; Y10S106/00; Y10S106/01; Y10S106/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A SUBSTANTIALLY DRY LIGHTWEIGHT CASTABLE REFRACTORY MIX CONSISTING ESSENTIALLY OF FROM ABOUT 6% TO ABOUT 12% BY WEIGHT EXPANDED PERLITE, FROM ABOUT 15% TO ABOUT 40% BY WEIGHT RAW KYANITE, FROM ABOUT 30% TO ABOUT 55% BY WEIGHT OF CALCINED FLINT FIRE CLAY, AND FROM ABOUT 20% TO ABOUT 35% BY WEIGHT OF CALCIUM ALUMINATE CEMENT, SAID MIX BEING ESSENTIALLY FREE OF RAW FIRE CLAY AND RAW KAOLINS.
Claim 2
Dependent Claim
68 words
A SUBSTANTIALLY DRY LIGHTWEIGHT CASTABLE REFRACTORY MIX CONSISTING ESSENTIALLY OF FROM ABOUT 6% TO ABOUT 12% BY WEIGHT EXPANDED PERLITE, FROM ABOUT 15% TO ABOUT 40% BY WEIGHT RAW KYANITE, FROM ABOUT 30% TO ABOUT 55% BY WEIGHT OF CALCINED FLINT FIRE CLAY, AND FROM ABOUT 20% TO ABOUT 35% BY WEIGHT OF CALCIUM ALUMINATE CEMENT, SAID MIX BEING ESSENTIALLY FREE OF RAW FIRE CLAY AND RAW KAOLINS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-27 | 1965-05-29 | 1965-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-27 | 1969-05-29 | 1969-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-27 | 1973-05-29 | 1973-11-28 | $7700.00 | Window Closed / Lapsed |