US3466337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regeneration of phenol from bisphenol a and byproducts
Assignee: Dow Chemical Co
•
Filing: 1967-01-30
•
Granted: 1969-09-09
•
Expires: 1987-01-30
Abstract
No abstract record available.
Inventors
- 👤 William E Smith
- 👤 Fred W Neumann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:40
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/50; C07C37/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1816286A
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US1798813A
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US2191831A
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US2979534A
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US3049569A
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US3075015A
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GB905994A
Cited
US3271463A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-08 | 1973-03-10 | 1973-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-08 | 1977-03-10 | 1977-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-08 | 1981-03-10 | 1981-09-09 | $7700.00 | Window Closed / Lapsed |