US3353976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory and method
Assignee: —
•
Filing: —
•
Granted: 1967-11-21
•
Expires: 1984-11-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:08
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/16; C04B35/18; C04B35/66; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3217; C04B2235/3231; C04B2235/3232; C04B2235/327; C04B2235/3272; C04B2235/34; C04B2235/3418; C04B2235/349; C04B2235/50; C04B2235/54; C04B2235/5418; C04B2235/5427; C04B2235/5436; C04B2235/70; C04B2235/72; C04B2235/74; C04B2235/77
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A FIRED SYNTHETIC REFRACTORY COMPOSITION MADE FROM A BATCH CONSISTING ESSENTIALLY OF ALUMINA HYDRATE MATERIAL IN AN AMOUNT SUFICIENT TO YIELD FROM 85 TO 95 PARTS BY WEIGHT AL2O3, SUFFICIENT FINELY DIVIDED SILICA YIELDING MATERIAL TO YIELD FROM 4 TO 8 PARTS BY WEIGHT SIO2, SUFFICIENT FINELY DIVIDED TITANIA YIELDING MATERIAL TO YIELD FROM 2 TO 4 PARTS BY WEIGHT TIO2, AND SUFFICIENT FINELY DIVIDED IRON OXIDE YIELDING MATERIAL TO YIELD FROM 1 TO 2 PARTS BY WEIGHT FE2O3.
Claim 2
Dependent Claim
79 words
A FIRED SYNTHETIC REFRACTORY COMPOSITION MADE FROM A BATCH CONSISTING ESSENTIALLY OF ALUMINA HYDRATE MATERIAL IN AN AMOUNT SUFICIENT TO YIELD FROM 85 TO 95 PARTS BY WEIGHT AL2O3, SUFFICIENT FINELY DIVIDED SILICA YIELDING MATERIAL TO YIELD FROM 4 TO 8 PARTS BY WEIGHT SIO2, SUFFICIENT FINELY DIVIDED TITANIA YIELDING MATERIAL TO YIELD FROM 2 TO 4 PARTS BY WEIGHT TIO2, AND SUFFICIENT FINELY DIVIDED IRON OXIDE YIELDING MATERIAL TO YIELD FROM 1 TO 2 PARTS BY WEIGHT FE2O3.
References Cited (Backward Citations)
US2360841A
Cited
US3251699A
Cited
US1268532A
Cited
US1528639A
Cited
US3282579A
Cited
US3241989A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |