Patent US3585931A successfully refreshed from Google Patents.
Patent US2809181A successfully refreshed from Google Patents.
US2809181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil soluble phenol-aldehyde resins
Assignee: Distillers Co Yeast Ltd
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Filing: 1954-03-15
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Granted: 1957-10-08
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Expires: 1974-03-15
Abstract
No abstract record available.
Inventors
- 👤 Turner John Harry Wallice
- 👤 Anthony Leonard Ralph
- 👤 Bramwyche Peter Lionel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:33
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/28; C08G8/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A PROCESS FOR THE PRODUCTION OF A THERMOPLASTIC OILSOLUBLE RESIN WHICH COMPRISES REACTING A MONOHYDRIC PHENOL NOVOLAK RESIN WHICH IS INSOLUBLE IN VEGETABLE OILS WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF STYRENE, NUCLEARLY ALKYL-SUBSTITUTED STYRENE AND NUCLEARLY CHLORO-SUBSTITUTED STYRENE AT A TEMPERATURE ABOVE 50*C. IN THE PRESENCE IN THE REACTION MIXTURE OF AN ACID CATALYST.
Claim 2
Dependent Claim
57 words
A PROCESS FOR THE PRODUCTION OF A THERMOPLASTIC OILSOLUBLE RESIN WHICH COMPRISES REACTING A MONOHYDRIC PHENOL NOVOLAK RESIN WHICH IS INSOLUBLE IN VEGETABLE OILS WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF STYRENE, NUCLEARLY ALKYL-SUBSTITUTED STYRENE AND NUCLEARLY CHLORO-SUBSTITUTED STYRENE AT A TEMPERATURE ABOVE 50*C. IN THE PRESENCE IN THE REACTION MIXTURE OF AN ACID CATALYST.
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) | 1960-10-07 | 1961-04-08 | 1961-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-07 | 1965-04-08 | 1965-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-07 | 1969-04-08 | 1969-10-08 | $7700.00 | Window Closed / Lapsed |