US2683751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenol production
Assignee: Hercules Powder Co
•
Filing: 1950-10-31
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Granted: 1954-07-13
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Expires: 1970-10-31
Abstract
No abstract record available.
Inventors
- 👤 Leo J Filar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:30
CPC Classifications
C; C07; C07C; C07C409/00; C07C409/02; C07C409/04; C07C409/08; C07C37/00; C07C37/08; C07C407/00; C07C409/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
13 words
THE PROCESS OF PRODUCING PHENOL WHICH COMPRISES CONTACTING BENZYL HYDROPEROXIDE WITH SULFURIC ACID.
References Cited (Backward Citations)
GB626095A
Cited
US2626281A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-12 | 1958-01-11 | 1958-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-12 | 1962-01-11 | 1962-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-12 | 1966-01-11 | 1966-07-13 | $7700.00 | Window Closed / Lapsed |