US2616872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing novolaks
Assignee: Hartford National Bank and Trust Co
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Filing: 1951-03-01
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Granted: 1952-11-04
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Expires: 1971-03-01
Abstract
No abstract record available.
Inventors
- 👤 Bloem Herman
- 👤 Stel Marinus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:52
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/26; B01J19/18; B01J19/1862; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00087; B01J2219/00094; B01J2219/00105; B01J2219/00108
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A CONTINUOUS PROCESS FOR PREPARING NOVOLAKS WHICH COMPRISES THE STEPS OF CONTINUOUSLY INTRODUCING STREAMS OF A PHENOL AND FORMALDEHYDE IN A PREDETERMINED RATIO AND A CATALYST INTO A FIRST REACTION VESSEL FILLED TO A PREDETERMINED LEVEL WITH AN INTIMATE MIXTURE OF REACTION COMPONENTS AND REACTION PRODUCTS RESULTING FROM THE REACTION OF THE PHENOL, THE FORMALDEHYDE, AND THE CATALYST, CONTINUOUSLY WITHDRAWING A STREAM OF THE REACTION MIXTURE IN THE FIRST VESSEL EQUAL IN VOLUME TO THE STREAMS OF THE REACTION COMPONENTS ENTERING THE FIRST VESSEL, CONTINUOUSLY INTRODUCING THE STREAM BEING WITHDRAWN FROM THE FIRST VESSEL INTO A SECOND VESSEL FILLED WITH A REACTION MIXTURE IN A MORE ADVANCED STAGE OF CONDENSATION, MIXING THE SECOND STREAM WITH THE REACTION MIXTURE IN THE SECOND VESSEL, CONTINUOUSLY WITHDRAWING A STREAM OF THE REACTION MIXTURE IN THE SECOND VESSEL EQUAL IN VOLUME TO THE STREAM ENTERING THE SECOND VESSEL,
Claim 2
Dependent Claim
144 words
A CONTINUOUS PROCESS FOR PREPARING NOVOLAKS WHICH COMPRISES THE STEPS OF CONTINUOUSLY INTRODUCING STREAMS OF A PHENOL AND FORMALDEHYDE IN A PREDETERMINED RATIO AND A CATALYST INTO A FIRST REACTION VESSEL FILLED TO A PREDETERMINED LEVEL WITH AN INTIMATE MIXTURE OF REACTION COMPONENTS AND REACTION PRODUCTS RESULTING FROM THE REACTION OF THE PHENOL, THE FORMALDEHYDE, AND THE CATALYST, CONTINUOUSLY WITHDRAWING A STREAM OF THE REACTION MIXTURE IN THE FIRST VESSEL EQUAL IN VOLUME TO THE STREAMS OF THE REACTION COMPONENTS ENTERING THE FIRST VESSEL, CONTINUOUSLY INTRODUCING THE STREAM BEING WITHDRAWN FROM THE FIRST VESSEL INTO A SECOND VESSEL FILLED WITH A REACTION MIXTURE IN A MORE ADVANCED STAGE OF CONDENSATION, MIXING THE SECOND STREAM WITH THE REACTION MIXTURE IN THE SECOND VESSEL, CONTINUOUSLY WITHDRAWING A STREAM OF THE REACTION MIXTURE IN THE SECOND VESSEL EQUAL IN VOLUME TO THE STREAM ENTERING THE SECOND VESSEL,
References Cited (Backward Citations)
US1660403A
Cited
US2456192A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-04 | 1956-05-05 | 1956-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-04 | 1960-05-05 | 1960-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-04 | 1964-05-05 | 1964-11-04 | $7700.00 | Window Closed / Lapsed |