US2750426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of cumylphenol
Assignee: Hercules Powder Co
•
Filing: 1956-01-18
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Granted: 1956-06-12
•
Expires: 1976-01-18
Abstract
No abstract record available.
Inventors
- 👤 Armstrong Godfrey Paul
- 👤 Bellringer Frederick James
- 👤 Bewlev Thomas
- 👤 Bramwyche Peter Lionel
- 👤 Jackosn Geoffrey William
- 👤 Wikins Frederick John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:45
CPC Classifications
C; C07; C07C; C07C39/00; C07C39/02; C07C39/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |