US2172391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted diphenyl compositions
Assignee: Monsanto Chemicals Ltd
•
Filing: 1936-06-29
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Granted: 1939-09-12
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Expires: 1956-06-29
Abstract
No abstract record available.
Inventors
- 👤 Herbert J Krase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:32
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/08; C07; C07C; C07C15/00; C07C15/12; C07C15/14; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2/68
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) | 1942-09-11 | 1943-03-13 | 1943-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-09-11 | 1947-03-13 | 1947-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-09-11 | 1951-03-13 | 1951-09-12 | $7700.00 | Window Closed / Lapsed |