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US3549690A
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Carboxylic acid derivatives
Assignee: Imperial Chemical Industries Ltd
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Filing: 1967-06-08
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Granted: 1970-12-22
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Expires: 1987-06-08
Abstract
No abstract record available.
Inventors
- 👤 Thomas Leigh
- 👤 Leslie Arthur Mcardle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:08
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/26; C07C17/263; A; A61; A61K; A61K31/00; A61K31/185; A61K31/19; C07C17/2637; C07C317/00; C07C317/16; C07C317/22; C07C317/44; C07C323/00; C07C323/10; C07C323/18; C07C323/19; C07C323/50; C07C323/51; C07C323/56; C07C45/00; C07C45/61; C07C45/63; C07C49/00; C07C49/76; C07C49/80; C07C49/813; C07C59/00; C07C59/40; C07C59/58; C07C59/64; C07C59/66
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3332842A
Cited
US3364249A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |