US4016168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piperidine derivatives
Assignee: Sankyo Co Ltd
•
Filing: 1975-02-26
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Granted: 1977-04-05
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Expires: 1995-02-26
Abstract
Abstract A novel piperidine derivative having a stabilizing effect on a synthetic polymeric material and a composition comprising said piperidine derivative and a synthetic polymeric material.
Inventors
- 👤 Keisuke Murayama
- 👤 Syoji Morimura
- 👤 Takao Yoshioka
- 👤 Toshimasa Toda
- 👤 Eiko Mori
- 👤 Hideo Horiuchi
- 👤 Susumu Higashida
- 👤 Katsuaki Matsui
- 👤 Tomoyuki Kurumada
- 👤 Noriyuki Ohta
- 👤 Hisayou Osawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:23
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432; C08K5/3435
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
15 words
A compound having the formula ##STR18## wherein R 1 represents hydrogen atom, methyl, er acetyl.
Claim 2
Dependent Claim
15 words
A compound having the formula ##STR18## wherein R 1 represents hydrogen atom, methyl, er acetyl.
Claim 3
Dependent Claim
16 words
A compound as claimed in claim 1 wherein R 1 is hydrogen atom or methyl group.
References Cited (Backward Citations)
US3733326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-04 | 1980-10-04 | 1981-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-04 | 1984-10-04 | 1985-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-04 | 1988-10-04 | 1989-04-05 | $7700.00 | Window Closed / Lapsed |