US2457078A
Expired / Lapsed
US
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Method for brominating heterocyclic compounds
Assignee: Monsanto Chemical Co
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Filing: 1944-07-29
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Granted: 1948-12-21
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Expires: 1964-07-29
Abstract
No abstract record available.
Inventors
- 👤 Ferdinand B Zienty
- 👤 Lucas P Kyrides
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:22
CPC Classifications
C; C07; C07D; C07D285/00; C07D285/01; C07D285/02; C07D285/04; C07D285/12; C07D285/125; C07D285/135; C07D277/00; C07D277/02; C07D277/20; C07D277/32; C07D277/38; C07D293/00; C07D293/02; C07D293/04; C07D293/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-21 | 1952-06-21 | 1952-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-21 | 1956-06-21 | 1956-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-21 | 1960-06-21 | 1960-12-21 | $7700.00 | Window Closed / Lapsed |