Patent US5191878A successfully refreshed from Google Patents.
US2347562A
Expired / Lapsed
US
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High molecular weight polyhydric alcohol
Assignee: Wyeth Holdings LLC
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Filing: 1940-05-31
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Granted: 1944-04-25
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Expires: 1960-05-31
Abstract
No abstract record available.
Inventors
- 👤 William B Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:59
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/52; C07C31/00; C07C31/18; C09; C09D; C09D7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1947-04-25 | 1947-10-25 | 1948-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-04-25 | 1951-10-25 | 1952-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-04-25 | 1955-10-25 | 1956-04-25 | $7700.00 | Window Closed / Lapsed |