Patent US3248399A successfully refreshed from Google Patents.
US3248399A
Expired / Lapsed
US
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Process for preparation of 2-hydroxyalkyl imidazolidinones
Assignee: Dow Chemical Co
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Filing: 1963-04-25
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Granted: 1966-04-26
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Expires: 1983-04-25
Abstract
No abstract record available.
Inventors
- 👤 Wilhelm E Walles
- 👤 Stanley S Leff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:57
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/26; C07; C07D; C07D233/00; C07D233/04; C07D233/28; C07D233/30; C07D233/32; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3442; C08K5/3445
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
THE PROCESS OF MAKING AN IMIDAZOLIDINONE HAVING THE FORMULA
Claim 2
Dependent Claim
9 words
THE PROCESS OF MAKING AN IMIDAZOLIDINONE HAVING THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |