US2963483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nu-glycidylpiperazine and method of making it
Assignee: Union Carbide Corp
•
Filing: 1958-12-22
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Granted: 1960-12-06
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Expires: 1978-12-22
Abstract
No abstract record available.
Inventors
- 👤 Donald L Heywood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:06
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/08; C07D295/084; C07D295/088; C07D303/00; C07D303/02; C07D303/36; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/22; C08G65/26; C08G65/2603; C08G65/2606; C08G65/2609
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1977253A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-06 | 1964-06-06 | 1964-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-06 | 1968-06-06 | 1968-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-06 | 1972-06-06 | 1972-12-06 | $7700.00 | Window Closed / Lapsed |