Patent US2577240A successfully refreshed from Google Patents.
US2205449A
Expired / Lapsed
US
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Treating vinylidene chloride polymers
Assignee: Dow Chemical Co
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Filing: 1938-03-04
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Granted: 1940-06-25
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Expires: 1958-03-04
Abstract
No abstract record available.
Inventors
- 👤 Ralph M Wiley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:53
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/08; D; D06; D06M; D06M13/00; D06M13/10; D06M13/144; D06M13/148; C08J2327/00; C08J2327/02; C08J2327/04; C08J2327/08
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) | 1943-06-25 | 1943-12-25 | 1944-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-06-25 | 1947-12-25 | 1948-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-06-25 | 1951-12-25 | 1952-06-25 | $7700.00 | Window Closed / Lapsed |