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US2656355A
Expired / Lapsed
US
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Purification of cyclonite
Assignee: —
•
Filing: —
•
Granted: 1953-10-20
•
Expires: 1970-10-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:32
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A METHOD OF PURIFYING CRUDE CYCLONITE WHICH COMPRISES FORMING A SOLUTION OF SAID CRUDE CYCLONITE IN AN ESSENTIALLY NON-ACIDIC INERT SOLVENT THEREFOR, ADDING WATER IN THE FORM OF STEAM IN CONTROLLED AMOUNTS TO SAID SOLUTION WHEREBY TO PRODUCE A WATER-CONTAINING CYCLONITE SOLUTION, AND THEREAFTER GRADUALLY REMOVING SAID CYCLONITE-SOLVENT BY DISTILLATION, WHEREBY THE CYCLONITE IN SEPARATED IN A PURIFIED FORM FROM SAID SOLVENT IN THE PRESENCE OF WATER.
Claim 2
Independent Claim
67 words
A METHOD OF PURIFYING CRUDE CYCLONITE WHICH COMPRISES FORMING A SOLUTION OF SAID CRUDE CYCLONITE IN AN ESSENTIALLY NON-ACIDIC INERT SOLVENT THEREFOR, ADDING WATER IN THE FORM OF STEAM IN CONTROLLED AMOUNTS TO SAID SOLUTION WHEREBY TO PRODUCE A WATER-CONTAINING CYCLONITE SOLUTION, AND THEREAFTER GRADUALLY REMOVING SAID CYCLONITE-SOLVENT BY DISTILLATION, WHEREBY THE CYCLONITE IN SEPARATED IN A PURIFIED FORM FROM SAID SOLVENT IN THE PRESENCE OF WATER.
References Cited (Backward Citations)
US2410699A
Cited
DE670921C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-19 | 1957-04-20 | 1957-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-19 | 1961-04-20 | 1961-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-19 | 1965-04-20 | 1965-10-20 | $7700.00 | Window Closed / Lapsed |