Patent US2198374A successfully refreshed from Google Patents.
US2198374A
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Cyclic condensation product
Assignee: Rohm and Haas Co
•
Filing: 1938-12-07
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Granted: 1940-04-23
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Expires: 1958-12-07
Abstract
No abstract record available.
Inventors
- 👤 Herman A Bruson
- 👤 John W Kroeger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:08
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/77; C07C; C07C13/00; C07C13/28; C07C13/32; C07C13/54; C07C13/573; C07C13/58; C07C13/62; C07C13/66; C07C2/00; C07C2/86; C07C2/861; C07C2/862; C07C2/864; C07C37/00; C07C37/11; C07C37/14; C07C37/16; C07C37/18; C07C39/00; C07C39/12; C07C39/17; C07C41/00; C07C41/01; C07C41/18; C07C41/30; C07D311/00; C07D311/02; C07D311/78; C07D311/92; C07D333/00; C07D333/50; C07D333/52; C07D333/54; C07C2527/00; C07C2527/02; C07C2527/053; C07C2601/00; C07C2601/12; C07C2601/14; C07C2602/00; C07C2602/02; C07C2602/04; C07C2602/10; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/22; C07C2603/24; C07C2603/40; C07C2603/42
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 |