Patent US2197968A successfully refreshed from Google Patents.
Patent US2615889A successfully refreshed from Google Patents.
US2615889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction products of nitriles
Assignee: —
•
Filing: —
•
Granted: 1952-10-28
•
Expires: 1969-10-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:35
CPC Classifications
C; C07; C07D; C07D251/00; C07D251/02; C07D251/12; C07D251/14; C07D251/24; C07D487/00; C07D487/02; C07D487/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
AS A NEW PRODUCT, A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
9 words
AS A NEW PRODUCT, A COMPOUND OF THE FORMULA
References Cited (Backward Citations)
US2559835A
Cited
US2568620A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-28 | 1956-04-28 | 1956-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-28 | 1960-04-28 | 1960-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-28 | 1964-04-28 | 1964-10-28 | $7700.00 | Window Closed / Lapsed |