US2538883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenol-modified acetone resins
Assignee: Union Carbide Corp
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Filing: 1947-07-18
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Granted: 1951-01-23
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Expires: 1967-07-18
Abstract
No abstract record available.
Inventors
- 👤 Conrad F Schrimpe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:46
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/06; C08G2/18; C08G2/20; C08G2/30; C08G6/00; C08G6/02; C08G8/00; C08G8/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
PROCESS WHICH COMPRISES CONDENSING A REACTION MIXTURE CONSISTING OF A MOLE OF ACETONE AND FROM ONE TO TWO MOLES OF FORMALDEHYDE AS THE ESSENTIAL REACTIVE INGREDIENTS IN THE PRESENCE OF AN INORGANIC BASE ESTABLISHING A PH BETWEEN 9.5 AND 11.5 AND OF ABOUT 10 TO 35 PER CENT ON THE WEIGHT OF THE ACETONE OF A MONOHYDRIC PHENOL FROM THE GROUP CONSISTING OF PHENOL, CRESOLS, XYLENOLS AND P-PHENYL-PHENOL.
Claim 2
Dependent Claim
68 words
PROCESS WHICH COMPRISES CONDENSING A REACTION MIXTURE CONSISTING OF A MOLE OF ACETONE AND FROM ONE TO TWO MOLES OF FORMALDEHYDE AS THE ESSENTIAL REACTIVE INGREDIENTS IN THE PRESENCE OF AN INORGANIC BASE ESTABLISHING A PH BETWEEN 9.5 AND 11.5 AND OF ABOUT 10 TO 35 PER CENT ON THE WEIGHT OF THE ACETONE OF A MONOHYDRIC PHENOL FROM THE GROUP CONSISTING OF PHENOL, CRESOLS, XYLENOLS AND P-PHENYL-PHENOL.
References Cited (Backward Citations)
US2206906A
Cited
US2205427A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-22 | 1954-07-24 | 1955-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-22 | 1958-07-24 | 1959-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-22 | 1962-07-24 | 1963-01-23 | $7700.00 | Window Closed / Lapsed |