Patent US3135473A successfully refreshed from Google Patents.
US3135473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of converting potassium chloride fines into a relatively coarse granular product by compaction
Assignee: Cyprus Amax Minerals Co
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Filing: 1962-03-21
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Granted: 1964-06-02
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Expires: 1982-03-21
Abstract
No abstract record available.
Inventors
- 👤 Dale L Schrader
- 👤 Bob K Gregory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:27
CPC Classifications
C; C01; C01D; C01D3/00; C01D3/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
THE PROCESS OF CONVERTING POTASSIUM CHLORIDE FINES INTO A RELATIVELY COARSE, FREE FLOWING GRANULAR PRODUCT WHICH COMPRISES SUBJECTING A SUBSTANTIALLY DRY FINE FRACTION HAVING A BULK DENSITY OF AT LEAST 75 LBS. PER CUBIC FOOT TO COMPACTION BY PASSAGE BETWEEN ROLS IMPARTING A PRESSURE OF AT LEAST 8 KIPS PER SQUARE INCH TO THE FINE FRACTION BEING FED THERETHROUGH AND THEREBY PRODUCING A DENSE SHEET, THEREAFTER GRANULATING THE SHEET AND SCREEN-
Claim 2
Dependent Claim
71 words
THE PROCESS OF CONVERTING POTASSIUM CHLORIDE FINES INTO A RELATIVELY COARSE, FREE FLOWING GRANULAR PRODUCT WHICH COMPRISES SUBJECTING A SUBSTANTIALLY DRY FINE FRACTION HAVING A BULK DENSITY OF AT LEAST 75 LBS. PER CUBIC FOOT TO COMPACTION BY PASSAGE BETWEEN ROLS IMPARTING A PRESSURE OF AT LEAST 8 KIPS PER SQUARE INCH TO THE FINE FRACTION BEING FED THERETHROUGH AND THEREBY PRODUCING A DENSE SHEET, THEREAFTER GRANULATING THE SHEET AND SCREEN-
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) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |