Patent US3173939A successfully refreshed from Google Patents.
US3173939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of cyanomethyleneglutaric and cyanomethylglutaric compounds
Assignee: Dow Chemical Co
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Filing: 1961-11-01
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Granted: 1965-03-16
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Expires: 1981-11-01
Abstract
No abstract record available.
Inventors
- 👤 Johnson Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:45
CPC Classifications
C; C07; C07C; C07C255/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
A PROCESS FOR PREPARING 3-CYANOMETHYLGLUTARIC COMPOUNDS OF THE FORMULA
Claim 2
Dependent Claim
9 words
A PROCESS FOR PREPARING 3-CYANOMETHYLGLUTARIC COMPOUNDS OF THE FORMULA
References Cited (Backward Citations)
US2655526A
Cited
US2793233A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-15 | 1968-09-14 | 1969-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-15 | 1972-09-14 | 1973-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-15 | 1976-09-14 | 1977-03-16 | $7700.00 | Window Closed / Lapsed |