US2626236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of naphthalene
Assignee: Beazer East Inc
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Filing: 1949-02-08
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Granted: 1953-01-20
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Expires: 1969-02-08
Abstract
No abstract record available.
Inventors
- 👤 Benjamin F Tatterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:54
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; C07C7/14833; C07C7/14841
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
IN A PROCESS FOR THE PURIFICATION OF NAPHTHALENE BY TREATMENT WITH METALLIC SODIUM FOLLOWED BY DISTILLATION OF NAPTHALENE FROM THE SODIUM REACTION MASS LEAVING A SOLID RESIDUE, THE STEPS OF TREATING IN THE STILL THE RESIDUE FROM SAID DISTILLATION WHICH COMPRISE FEEDING STEAM INTO THE SPACE OF THE RESIDUE-CONTAINING STILL ABOVE SAID RESIDUE, CONDENSING AT LEAST PART OF SAID STEAM AND ALLOWING THE RESULTANT CONDENSATION WATER TO FLOW ONTO SAID RESIDUE, AND REFLUXING SAID WATER UNTIL THE RESIDUE HAS BEEN CONVERTED TO A FLOWABLE LIQUID.
Claim 2
Dependent Claim
85 words
IN A PROCESS FOR THE PURIFICATION OF NAPHTHALENE BY TREATMENT WITH METALLIC SODIUM FOLLOWED BY DISTILLATION OF NAPTHALENE FROM THE SODIUM REACTION MASS LEAVING A SOLID RESIDUE, THE STEPS OF TREATING IN THE STILL THE RESIDUE FROM SAID DISTILLATION WHICH COMPRISE FEEDING STEAM INTO THE SPACE OF THE RESIDUE-CONTAINING STILL ABOVE SAID RESIDUE, CONDENSING AT LEAST PART OF SAID STEAM AND ALLOWING THE RESULTANT CONDENSATION WATER TO FLOW ONTO SAID RESIDUE, AND REFLUXING SAID WATER UNTIL THE RESIDUE HAS BEEN CONVERTED TO A FLOWABLE LIQUID.
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) | 1956-01-20 | 1956-07-21 | 1957-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-20 | 1960-07-21 | 1961-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-20 | 1964-07-21 | 1965-01-20 | $7700.00 | Window Closed / Lapsed |