US3159684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing polyphenyl ethers
Assignee: Dow Chemical Co
•
Filing: 1959-10-05
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Granted: 1964-12-01
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Expires: 1979-10-05
Abstract
No abstract record available.
Inventors
- 👤 Edward P Merica
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:09
CPC Classifications
C; C07; C07C; C07C41/00; C07C41/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1744961A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |