US3487088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing 1,3-dimethylol-4,5-dihydroxy-2-imidazolidinone
Assignee: Wyeth Holdings LLC
•
Filing: 1967-04-14
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Granted: 1969-12-30
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Expires: 1987-04-14
Abstract
No abstract record available.
Inventors
- 👤 Kenneth Herald Remley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:05
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/04; C07D233/28; C07D233/30; C07D233/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2731472A
Cited
US2764573A
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US2755198A
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US2876062A
Cited
US2777857A
Cited
US3112156A
Cited
US3209010A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-29 | 1973-06-30 | 1973-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-29 | 1977-06-30 | 1977-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-29 | 1981-06-30 | 1981-12-30 | $7700.00 | Window Closed / Lapsed |