US2905565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous slurry of comminuted argillaceous limestone material and process of producing same
Assignee: Hoechst AG
•
Filing: 1953-11-17
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Granted: 1959-09-22
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Expires: 1973-11-17
Abstract
No abstract record available.
Inventors
- 👤 Dietz Karl
- 👤 Greune Heinrich
- 👤 Stroh Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:35
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/13; C04B33/1305
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A PROCESS FOR THE PRODUCTION OF AN AQUEOUS SLURRY OF COMMINUTED ARGILLACEOUS LIMESTONE MATERIAL WHICH, UPON BURNING, PRODUCES CEMENT, SAID SLURRY BEING SUFFICIENTLY FLUID TO BE PUMPED AND CONTAINING A QUANTITY OF WATER OTHERWISE INSUFFICIENT FOR THE PURPOSE, SAID PROCESS COMPRISING ADDING TO SAID ARGILLACEOUS LIMESTONE MATERIAL PRESENT IN SAID SLURRY, A COMPOUND OF 2N AT LEAST TRIBASIC ACID SELECTED FROM THE GROUP CONSISTING OF SALTS OF AN ACID OBTAINED BY POLYMERIZING AT LEAST ONE ACID CONTAINING THE ETHYLENE -CH=CH-GROUP, OF A SULFONIC ACID OF THE NAPHTHALENE SERIES, OF CARBAZOL-TETRA-SULFONIC ACID AND SALT-LIKE COMPOUNDS OF THESE ACIDS IN AN AMOUNT OF AT LEAST ABOUT 0.01 PER MIL, CALCULATED ON THE WEIGHT OF THE SLURRY.
Claim 2
Dependent Claim
114 words
A PROCESS FOR THE PRODUCTION OF AN AQUEOUS SLURRY OF COMMINUTED ARGILLACEOUS LIMESTONE MATERIAL WHICH, UPON BURNING, PRODUCES CEMENT, SAID SLURRY BEING SUFFICIENTLY FLUID TO BE PUMPED AND CONTAINING A QUANTITY OF WATER OTHERWISE INSUFFICIENT FOR THE PURPOSE, SAID PROCESS COMPRISING ADDING TO SAID ARGILLACEOUS LIMESTONE MATERIAL PRESENT IN SAID SLURRY, A COMPOUND OF 2N AT LEAST TRIBASIC ACID SELECTED FROM THE GROUP CONSISTING OF SALTS OF AN ACID OBTAINED BY POLYMERIZING AT LEAST ONE ACID CONTAINING THE ETHYLENE -CH=CH-GROUP, OF A SULFONIC ACID OF THE NAPHTHALENE SERIES, OF CARBAZOL-TETRA-SULFONIC ACID AND SALT-LIKE COMPOUNDS OF THESE ACIDS IN AN AMOUNT OF AT LEAST ABOUT 0.01 PER MIL, CALCULATED ON THE WEIGHT OF THE SLURRY.
References Cited (Backward Citations)
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Cited
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Cited
US2390225A
Cited
US2587044A
Cited
US2709661A
Cited
US2690975A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-21 | 1963-03-23 | 1963-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-21 | 1967-03-23 | 1967-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-21 | 1971-03-23 | 1971-09-22 | $7700.00 | Window Closed / Lapsed |