US3333972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory products and method
Assignee: —
•
Filing: —
•
Granted: 1967-08-01
•
Expires: 1984-08-01
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:17
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/03; C04B14/00; C04B14/02; C04B14/30; C04B14/304; C04B24/00; C04B24/04; C04B24/06; C04B35/04; C04B35/043; C04B35/622; C04B35/626; C04B35/63; C04B35/6303; C04B35/66; C04B2111/00; C04B2111/00431; C04B2111/20; C04B2111/28; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3205; C04B2235/3206; C04B2235/3208
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
DRY REFRACTORY COMPOSITION WHICH CONSISTS ESSENTIALLY OF A REFACTORY AGGREGATE AND FROM 10% TO 60% OF A CEMEMTITIOUS REFRACTORY MATERIAL CONSISTING ESSENTIALLY OF AN INTIMATE ADMIXTURE OF FINELY DIVIDED NON-PLASTIC MAGNESIA AND FROM 0.1% TO 15% BASED ON THE WEIGHT OF SAID CEMENTITIOUS MATERIAL, OF AT LEAST ONE SUBSTANCE CHOSEN FROM THE GROUP CONSISTING OF AN ALPHATIC HYDROXY TRICARBOXYLIC ACID AND A SALT OF SAID ACID.
Claim 2
Dependent Claim
66 words
DRY REFRACTORY COMPOSITION WHICH CONSISTS ESSENTIALLY OF A REFACTORY AGGREGATE AND FROM 10% TO 60% OF A CEMEMTITIOUS REFRACTORY MATERIAL CONSISTING ESSENTIALLY OF AN INTIMATE ADMIXTURE OF FINELY DIVIDED NON-PLASTIC MAGNESIA AND FROM 0.1% TO 15% BASED ON THE WEIGHT OF SAID CEMENTITIOUS MATERIAL, OF AT LEAST ONE SUBSTANCE CHOSEN FROM THE GROUP CONSISTING OF AN ALPHATIC HYDROXY TRICARBOXYLIC ACID AND A SALT OF SAID ACID.
References Cited (Backward Citations)
US1853521A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-31 | 1971-01-30 | 1971-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-31 | 1975-01-30 | 1975-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-31 | 1979-01-30 | 1979-08-01 | $7700.00 | Window Closed / Lapsed |