US2888458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Salicylaldehyde and vanillin schiff base derivatives of certain aminoalkyl cyclic amidines
Assignee: Baker Petrolite LLC
•
Filing: 1957-10-17
•
Granted: 1959-05-26
•
Expires: 1977-10-17
Abstract
No abstract record available.
Inventors
- 👤 Verner L Stromberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:25
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/06; C07D233/00; C07D233/04; C07D233/06; C07D233/08; C07D233/12; C07D233/16; C07D233/20; C07D233/22; C07D233/24; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3442; C08K5/3445; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/232; C11; C11B; C11B5/00; C11B5/0042; C11B5/0064; C11B5/0085; Y; Y10; Y10S; Y10S507/00; Y10S507/927; Y10S507/929; Y10S507/931; Y10S507/939; Y10S516/00; Y10S516/01; Y10S516/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
CYCLIC AMIDINE DERIVATIVES SELECTED FROM THE CLASS CONSISTING OF
Claim 2
Dependent Claim
9 words
CYCLIC AMIDINE DERIVATIVES SELECTED FROM THE CLASS CONSISTING OF
References Cited (Backward Citations)
US2792390A
Cited
US2819284A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-25 | 1962-11-24 | 1963-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-25 | 1966-11-24 | 1967-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-25 | 1970-11-24 | 1971-05-26 | $7700.00 | Window Closed / Lapsed |