Patent US2843538A successfully refreshed from Google Patents.
Patent US2085709A successfully refreshed from Google Patents.
US2085709A
Expired / Lapsed
US
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Composition for combating foam
Assignee: IG Farbenindustrie AG
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Filing: 1932-07-05
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Granted: 1937-06-29
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Expires: 1952-07-05
Abstract
No abstract record available.
Inventors
- 👤 Steibelt Elisabetha
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:28
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; B01D19/0404; Y; Y10; Y10S; Y10S435/00; Y10S435/804; Y10S435/812
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) | 1940-06-28 | 1940-12-28 | 1941-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-06-28 | 1944-12-28 | 1945-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-06-28 | 1948-12-28 | 1949-06-29 | $7700.00 | Window Closed / Lapsed |