US3035867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphate rock slurries containing a viscosity reducing agent
Assignee: Dow Chemical Co
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Filing: 1958-04-30
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Granted: 1962-05-22
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Expires: 1978-04-30
Abstract
No abstract record available.
Inventors
- 👤 Gerald M Corbett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:58
CPC Classifications
C; C05; C05B; C05B11/00; C05B11/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
COMPOSITION COMPRISING AN AQUEOUS SLURRY OF FINELY DIVIDED PHOSPHATE ROCK CONTAINING BETWEEN ABOUT 5 AND 60 WEIGHT PERCENT OF SUSPENDED PHOSPHATE ROCK SOLIDS THROUGH WHICH SLURRY THERE HAS BEEN UNIFORMLY DISTRIBUTED A QUANTITY OF BETWEEN ABOUT 0.01 AND 5 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF THE SLURRY, OF A VISCOSITY REDUCING AGENT SELECTED FROM THE GROUP CONSISTING OF FREE COAL ACIDS, ALKALI METAL AND AMMONIUM SALTS OF FREE COAL ACIDS, AND MIXTURES THEREOF; SAID COAL ACIDS BEING THE WATERSOLUBLE MIXED AROMATIC POLYCARBOXYLIC ACIDS THAT ARE THE PRODUCTS OF THE OXIDATION OF CARBONACEOUS MATERIALS, WHICH ACIDS TYPICALLY HAVE AN AVERAGE MOLECULAR WEIGHT
Claim 2
Dependent Claim
103 words
COMPOSITION COMPRISING AN AQUEOUS SLURRY OF FINELY DIVIDED PHOSPHATE ROCK CONTAINING BETWEEN ABOUT 5 AND 60 WEIGHT PERCENT OF SUSPENDED PHOSPHATE ROCK SOLIDS THROUGH WHICH SLURRY THERE HAS BEEN UNIFORMLY DISTRIBUTED A QUANTITY OF BETWEEN ABOUT 0.01 AND 5 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF THE SLURRY, OF A VISCOSITY REDUCING AGENT SELECTED FROM THE GROUP CONSISTING OF FREE COAL ACIDS, ALKALI METAL AND AMMONIUM SALTS OF FREE COAL ACIDS, AND MIXTURES THEREOF; SAID COAL ACIDS BEING THE WATERSOLUBLE MIXED AROMATIC POLYCARBOXYLIC ACIDS THAT ARE THE PRODUCTS OF THE OXIDATION OF CARBONACEOUS MATERIALS, WHICH ACIDS TYPICALLY HAVE AN AVERAGE MOLECULAR WEIGHT
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) | 1965-05-21 | 1965-11-20 | 1966-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-21 | 1969-11-20 | 1970-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-21 | 1973-11-20 | 1974-05-22 | $7700.00 | Window Closed / Lapsed |