Patent US2670370A successfully refreshed from Google Patents.
US2670370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation of certain heterocyclic compounds
Assignee: California Research LLC
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Filing: 1952-07-23
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Granted: 1954-02-23
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Expires: 1972-07-23
Abstract
No abstract record available.
Inventors
- 👤 Jr William G Toland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:04
CPC Classifications
C; C07; C07C; C07C55/00; C07C55/02; C07C55/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A METHOD OF PRODUCING ORGANIC ACIDS, THEIR AMIDES AND THEIR AMMONIUM SALTS, WHICH COMPRISES RUPTURING THE HETEROCYCLIC RING OF A HETEROCYCLIC COMPOUND CONTAINING 4 TO 5 CARBON ATOMS AND 1 ATOM OF THE GROUP CONSISTING OF OXYGEN AND SULFUR IN THE RING BY HEATING THE HETEROCYCLIC COMPOUND WITH ELEMENTAL SULFUR, WATER AND A WATER-SOLUBLE INORGANIC BASE TO A TEMPERATURE IN THE RANGE FROM 400* F. TO 700* F. UNDER A SUPERATMOSPHERIC PRESSURE SUFFICIENT TO MAINTAIN AT LEAST A PART OF THE WATER IN LIQUIQ PHASE.
Claim 2
Independent Claim
85 words
A METHOD OF PRODUCING ORGANIC ACIDS, THEIR AMIDES AND THEIR AMMONIUM SALTS, WHICH COMPRISES RUPTURING THE HETEROCYCLIC RING OF A HETEROCYCLIC COMPOUND CONTAINING 4 TO 5 CARBON ATOMS AND 1 ATOM OF THE GROUP CONSISTING OF OXYGEN AND SULFUR IN THE RING BY HEATING THE HETEROCYCLIC COMPOUND WITH ELEMENTAL SULFUR, WATER AND A WATER-SOLUBLE INORGANIC BASE TO A TEMPERATURE IN THE RANGE FROM 400* F. TO 700* F. UNDER A SUPERATMOSPHERIC PRESSURE SUFFICIENT TO MAINTAIN AT LEAST A PART OF THE WATER IN LIQUIQ PHASE.
References Cited (Backward Citations)
DE403123C
Cited
US2572810A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |