Patent US2731489A successfully refreshed from Google Patents.
US2731489A
Expired / Lapsed
US
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Dinitriles and process for their preparation
Assignee: Union Carbide Corp
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Filing: 1954-04-28
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Granted: 1956-01-17
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Expires: 1974-04-28
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry A Stansbury
- 👤 Howard R Guest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:30
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
CHEMICAL COMPOUNDS HAVING THE FORMULA:
Claim 2
Dependent Claim
5 words
CHEMICAL COMPOUNDS 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) | 1959-01-16 | 1959-07-18 | 1960-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-16 | 1963-07-18 | 1964-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-16 | 1967-07-18 | 1968-01-17 | $7700.00 | Window Closed / Lapsed |