US2571102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnesia refractory materials
Assignee: —
•
Filing: —
•
Granted: 1951-10-16
•
Expires: 1968-10-16
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:53
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/16; C04B35/03; C04B35/04; C04B35/043; C04B35/18; C04B35/622; C04B35/626; C04B35/62605; C04B35/62645; C04B35/62665; C04B35/66; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3205; C04B2235/3206; C04B2235/3208; C04B2235/3217; C04B2235/3222; C04B2235/34; C04B2235/3418; C04B2235/349; C04B2235/50; C04B2235/54; C04B2235/5418; C04B2235/5436
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
27 words
A FIRED FORSTERITIC REFRACTORY MATERIAL CONSISTING OF AGGLOMERATES WHICH EXHIBIT UPON PETROGRAPHIC MICROSCOPIC EXAMINATION ELONGATED ANGULAR FORSTERITE HOST CRYSTALS, SAID CRYSTALS EACH HAVING DISPERSED THEREIN PERICLASE CRYSTALS.
Claim 2
Dependent Claim
27 words
A FIRED FORSTERITIC REFRACTORY MATERIAL CONSISTING OF AGGLOMERATES WHICH EXHIBIT UPON PETROGRAPHIC MICROSCOPIC EXAMINATION ELONGATED ANGULAR FORSTERITE HOST CRYSTALS, SAID CRYSTALS EACH HAVING DISPERSED THEREIN PERICLASE CRYSTALS.
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) | 1954-10-15 | 1955-04-16 | 1955-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-15 | 1959-04-16 | 1959-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-15 | 1963-04-16 | 1963-10-16 | $7700.00 | Window Closed / Lapsed |