Patent US2197768A successfully refreshed from Google Patents.
US2197768A
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Polymerized hydrocarbon composition
Assignee: IG Farbenindustrie AG
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Filing: 1933-01-14
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Granted: 1940-04-23
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Expires: 1953-01-14
Abstract
No abstract record available.
Inventors
- 👤 Pier Mathias
- 👤 Christmann Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:32
CPC Classifications
C; C10; C10M; C10M107/00; C10M107/20; C10M107/30; C10G; C10G32/00; C10G32/02; C10M101/00; C10M101/02; C10M159/00; C10M159/02; C10M159/06
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) | 1943-04-23 | 1943-10-23 | 1944-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-04-23 | 1947-10-23 | 1948-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-04-23 | 1951-10-23 | 1952-04-23 | $7700.00 | Window Closed / Lapsed |