US3853890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azine derivatives of piperidine
Assignee: Novartis Corp
•
Filing: 1971-09-17
•
Granted: 1974-12-10
•
Expires: 1991-09-17
Abstract
Abstract New azine derivatives of piperidine are stabilizers for organic materials. They are produced by reacting the corresponding piperidones with hydrazine hydrate.
Inventors
- 👤 B Holt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:48
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432; C08K5/3435
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
32 words
A compound according to claim 1 wherein X and X1 are the same or different and X represents NO or formyl, acetyl or propionyl and X1 represents NO or acetyl or propionyl.
Claim 4
Dependent Claim
8 words
A compound according to claim 1 which is
Claim 5
Dependent Claim
8 words
A compound according to claim 1 which is
References Cited (Backward Citations)
US3322774A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |