US3502673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aryl-pyrimidine-alkanoic acid derivatives
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1967-05-16
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Granted: 1970-03-24
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Expires: 1987-05-16
Abstract
No abstract record available.
Inventors
- 👤 Walter Hepworth
- 👤 Thomas Walton Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:13
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/26; C07D239/28; C07D239/32; C07D239/34; C07D239/36; C07D239/42; G; G11; G11B; G11B15/00; G11B15/18; G11B15/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3225047A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-23 | 1973-09-22 | 1974-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-23 | 1977-09-22 | 1978-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-23 | 1981-09-22 | 1982-03-24 | $7700.00 | Window Closed / Lapsed |