Patent US2852552A successfully refreshed from Google Patents.
US2852552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1-amino-1-hydroxy-2, 2-dicyanoethylene and its salts
Assignee: EIDP Inc
•
Filing: 1957-04-08
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Granted: 1958-09-16
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Expires: 1977-04-08
Abstract
No abstract record available.
Inventors
- 👤 Jr Ernest Lewis Little
- 👤 Mower Howard Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:02
CPC Classifications
C; C07; C07C; C07C255/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
1 words
1-AMINO-1-HYDROXY-2,2-DICYANOETHYLENE.
Claim 2
Dependent Claim
1 words
1-AMINO-1-HYDROXY-2,2-DICYANOETHYLENE.
References Cited (Backward Citations)
US2375185A
Cited
US2773892A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |