US3192270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of pure 4, 4'-di-(hydroxy-phenyl)-alkanes
Assignee: Bayer AG
•
Filing: 1962-02-21
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Granted: 1965-06-29
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Expires: 1982-02-21
Abstract
No abstract record available.
Inventors
- 👤 Meyer Karl-Heinrich
- 👤 Schnell Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:53
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/20; C07C37/68; C07C37/70; C07C37/72; C07C37/84; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
A PROCESS FOR THE PRODUCTION OF A SUBSTANTIALLY PURE BIS(4-HYDROXYPHENYL) ALKANE OF THE GROUP CONSISTING OF COMPOUNDS HAVING THE FORMULAE
Claim 2
Dependent Claim
20 words
A PROCESS FOR THE PRODUCTION OF A SUBSTANTIALLY PURE BIS(4-HYDROXYPHENYL) ALKANE OF THE GROUP CONSISTING OF COMPOUNDS HAVING THE FORMULAE
References Cited (Backward Citations)
US2791616A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-28 | 1968-12-28 | 1969-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-28 | 1972-12-28 | 1973-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-28 | 1976-12-28 | 1977-06-29 | $7700.00 | Window Closed / Lapsed |