US2754335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Triphenylols
Assignee: Union Carbide Corp
•
Filing: 1950-09-06
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Granted: 1956-07-10
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Expires: 1970-09-06
Abstract
No abstract record available.
Inventors
- 👤 Howard L Bender
- 👤 Alford G Farnham
- 👤 John W Guyer
- 👤 Thomas B Gibb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:55
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/115; C07C37/16; C07C37/20; C08; C08G; C08G8/00; C08G8/04; C08G8/08; C08G8/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
PROCESS FOR OBTAINING A TRIPHENYLOL DERIVATIVE OF PHENOL AND FORMALDEHYDE WHICH COMPRISES CONDENSING A MOLAR AMOUNT OF HYDROXYBENZYL ALCOHOL WITH AT LEAST A MOLAR AMOUNT OF A HYDROXY-HYDROXY''-DIPHENYL METHANE.
Claim 2
Dependent Claim
29 words
PROCESS FOR OBTAINING A TRIPHENYLOL DERIVATIVE OF PHENOL AND FORMALDEHYDE WHICH COMPRISES CONDENSING A MOLAR AMOUNT OF HYDROXYBENZYL ALCOHOL WITH AT LEAST A MOLAR AMOUNT OF A HYDROXY-HYDROXY''-DIPHENYL METHANE.
References Cited (Backward Citations)
US1020593A
Cited
US1982651A
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DE668952C
Cited
DE673828C
Cited
US2116084A
Cited
US2400718A
Cited
US2475587A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-10 | 1960-01-09 | 1960-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-10 | 1964-01-09 | 1964-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-10 | 1968-01-09 | 1968-07-10 | $7700.00 | Window Closed / Lapsed |