US3026211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calcium oxide refractory and process of producing same
Assignee: VIRGIL F OSTLER
•
Filing: 1959-02-06
•
Granted: 1962-03-20
•
Expires: 1979-02-06
Abstract
No abstract record available.
Inventors
- 👤 Ivan B Cutler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:41
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/03; C04B35/057; Y; Y10; Y10S; Y10S264/00; Y10S264/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A PROCESS FOR PRODUCING A BASIC REFRACATORY MATERIAL, COMPRISING PREPARING A CALCIUM OXIDE POWDER FROM CALCICUM HYDORXIDE BY CALCINING THE LATTER; PREPARING A SINTERABLE COMPACT FROM THE CALCIUM OXIDE POWDER IN AN ATMOSPHERE SUBSTANTIALLY FREE FROM MOISTRE AND CARBON DIOXIDE AND UNDER A PRESSUER OF AT LEAST SUBSTANTIALLY ONE TON PER SQUARE INCH; AND SINTERING SAID COMPACT AT A TEMPERATURE OF FROM APPROXIMATELY 1400*C. TO APPROXIMATELY 1600*C.
Claim 2
Dependent Claim
67 words
A PROCESS FOR PRODUCING A BASIC REFRACATORY MATERIAL, COMPRISING PREPARING A CALCIUM OXIDE POWDER FROM CALCICUM HYDORXIDE BY CALCINING THE LATTER; PREPARING A SINTERABLE COMPACT FROM THE CALCIUM OXIDE POWDER IN AN ATMOSPHERE SUBSTANTIALLY FREE FROM MOISTRE AND CARBON DIOXIDE AND UNDER A PRESSUER OF AT LEAST SUBSTANTIALLY ONE TON PER SQUARE INCH; AND SINTERING SAID COMPACT AT A TEMPERATURE OF FROM APPROXIMATELY 1400*C. TO APPROXIMATELY 1600*C.
References Cited (Backward Citations)
US2876122A
Cited
US2948631A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-19 | 1965-09-18 | 1966-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-19 | 1969-09-18 | 1970-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-19 | 1973-09-18 | 1974-03-20 | $7700.00 | Window Closed / Lapsed |