US3141790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Burned basic refractory shapes
Assignee: —
•
Filing: —
•
Granted: 1964-07-21
•
Expires: 1981-07-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:25
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/66; C04B35/01; C04B35/03; C04B35/04; C04B35/043; F; F27; F27D; F27D1/00; F27D1/0003; F27D1/0006; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3205; C04B2235/3206; C04B2235/3208; C04B2235/3217; C04B2235/327; C04B2235/3272; C04B2235/34; C04B2235/3418; C04B2235/50; C04B2235/54; C04B2235/5418; C04B2235/5427; C04B2235/70; C04B2235/72; Y; Y10; Y10S; Y10S264/00; Y10S264/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
TAR IMPREGNATED CERAMICALLY BONDED BASIC REFRACTORY SHAPES SUITABLE FOR USE IN METALLURGICAL VESSELS, SAID SHAPES, BY WEIGHT AND ON THE BASIS OF AN OXIDE ANALYSIS, CONSISTING ESSENTIALLY OF FROM ABOUT 96 TO 97% MGO, THERE BEING CAO AND SIO2 IN A WEIGHT RATIO BETWEEN 3 TO 1 AND ABOUT 4 TO 1, AND MATERIAL OF THE GROUP CR2O3, AL2O3, AND FE2O3, IN AN AMOUNT NOT EXCEEDING 1%, SAID SHAPES MICROSCOPICALLY CHARACTERIZED BY PERICLASE TO PERICLASE CRYSTAL ATTACHMENT AND WITH THE CAO AND SIO2 CONTENT LARGELY PRESENT IN SPACED DISCONNECTED POCKETS BE-
Claim 2
Dependent Claim
91 words
TAR IMPREGNATED CERAMICALLY BONDED BASIC REFRACTORY SHAPES SUITABLE FOR USE IN METALLURGICAL VESSELS, SAID SHAPES, BY WEIGHT AND ON THE BASIS OF AN OXIDE ANALYSIS, CONSISTING ESSENTIALLY OF FROM ABOUT 96 TO 97% MGO, THERE BEING CAO AND SIO2 IN A WEIGHT RATIO BETWEEN 3 TO 1 AND ABOUT 4 TO 1, AND MATERIAL OF THE GROUP CR2O3, AL2O3, AND FE2O3, IN AN AMOUNT NOT EXCEEDING 1%, SAID SHAPES MICROSCOPICALLY CHARACTERIZED BY PERICLASE TO PERICLASE CRYSTAL ATTACHMENT AND WITH THE CAO AND SIO2 CONTENT LARGELY PRESENT IN SPACED DISCONNECTED POCKETS BE-
References Cited (Backward Citations)
US3106475A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |