Patent US5207712A successfully refreshed from Google Patents.
US2188778A
Expired / Lapsed
US
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Production of polymerization products of vinyl ethers
Assignee: IG Farbenindustrie AG
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Filing: 1937-02-25
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Granted: 1940-01-30
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Expires: 1957-02-25
Abstract
No abstract record available.
Inventors
- 👤 Reppe Walter
- 👤 Kuenn Erich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:01
CPC Classifications
C; C08; C08F; C08F216/00; C08F216/12; A; A61; A61B; A61B13/00; A61C; A61C17/00; A61C17/06; A61C17/08; C08F16/00; C08F16/12
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) | 1943-01-29 | 1943-07-31 | 1944-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-01-29 | 1947-07-31 | 1948-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-01-29 | 1951-07-31 | 1952-01-30 | $7700.00 | Window Closed / Lapsed |