US2579122A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resorcinol recovery process
Assignee: Heyden Chemical Corp
•
Filing: 1949-04-13
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Granted: 1951-12-18
•
Expires: 1969-04-13
Abstract
No abstract record available.
Inventors
- 👤 Philip W Oppenheimer
- 👤 William R Cake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:29
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/68; C07C37/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A PROCESS WHICH COMPRISES TREATING WITH A SOLVENT SELECTED FROM THE GROUP CONSISTING OF CHLOROBENZENE AND TOLUENE AT AN ELEVATED TEMPERATURE BELOW THE BOILING POINT OF SAID SOLVENT A REACTION MIXTURE OBTAINED FROM THE FORMATION OF RESORCINOL CONTAINING RESORCINOL AND PHENOL, TO WHICH AN ACID HAS BEEN ADDED AND THE WATER
Claim 2
Dependent Claim
51 words
A PROCESS WHICH COMPRISES TREATING WITH A SOLVENT SELECTED FROM THE GROUP CONSISTING OF CHLOROBENZENE AND TOLUENE AT AN ELEVATED TEMPERATURE BELOW THE BOILING POINT OF SAID SOLVENT A REACTION MIXTURE OBTAINED FROM THE FORMATION OF RESORCINOL CONTAINING RESORCINOL AND PHENOL, TO WHICH AN ACID HAS BEEN ADDED AND THE WATER
References Cited (Backward Citations)
GB415715A
Cited
US2381209A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-17 | 1955-06-18 | 1955-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-17 | 1959-06-18 | 1959-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-17 | 1963-06-18 | 1963-12-18 | $7700.00 | Window Closed / Lapsed |