US3425989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenol condensation process comprising reacting anhydrous phenol and an alkali catalyst at a temperature of at least 130 c.,and then slowly adding aldehyde
Assignee: Hooker Chemical Corp
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Filing: 1968-01-17
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Granted: 1969-02-04
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Expires: 1988-01-17
Abstract
No abstract record available.
Inventors
- 👤 Alvin F Shepard
- 👤 Thomas J Mcnaughtan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:03
CPC Classifications
C; C08; C08G; C08G16/00; C08G16/02; C08G16/0212; C08G8/00; C08G8/04; C08G8/08; C08G8/10; C08G8/28
Claims Analysis
Total Claims: 0
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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) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |