US3506665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
4-4'-(ethylenediimino) bis(2 - phenylpyrimidine - 5 - carboxylic acid)dialkyl esters and related compounds
Assignee: Wyeth LLC
•
Filing: 1968-03-08
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Granted: 1970-04-14
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Expires: 1988-03-08
Abstract
No abstract record available.
Inventors
- 👤 Dong H Kim
- 👤 Arthur A Santilli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:35
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/28; C07D239/32; C07D239/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2671788A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-13 | 1973-10-13 | 1974-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-13 | 1977-10-13 | 1978-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-13 | 1981-10-13 | 1982-04-14 | $7700.00 | Window Closed / Lapsed |