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US4237294A
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2,2,6,6-Tetramethylpiperidine derivatives
Assignee: Sankyo Co Ltd
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Filing: 1979-06-18
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Granted: 1980-12-02
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Expires: 1999-06-18
Abstract
Abstract 2,2,6,6-Tetramethylpiperidine derivatives having the formula ##STR1## wherein: X represents a group of formula ##STR2## R represents a hydrogen atom, methyl group, ethyl group, phenoxymethyl group or phenyl group; R' represents a methyl group or ethyl group; and m represents 0, 1 or 2, are excellent stabilizers for synthetic polymers.
Inventors
- 👤 Nobuo Soma
- 👤 Syoji Morimura
- 👤 Takao Yoshioka
- 👤 Tomoyuki Kurumada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:14
CPC Classifications
C; C07; C07D; C07D471/00; C07D471/02; C07D471/06; C07D471/10; C07D491/00; C07D491/02; C07D491/10; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432; C08K5/3435
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
28 words
A 2,2,6,6-tetramethylpiperidine compound having the formula ##STR9## wherein: X represents a group of formula ##STR10## R represents a hydrogen atom; represents an ethyl group; and m represents 2.
Claim 2
Dependent Claim
28 words
A 2,2,6,6-tetramethylpiperidine compound having the formula ##STR9## wherein: X represents a group of formula ##STR10## R represents a hydrogen atom; represents an ethyl group; and m represents 2.
Claim 3
Dependent Claim
11 words
A compound as claimed in claim 1 having the formula ##STR11##
Claim 4
Dependent Claim
11 words
A compound as claimed in claim 1 having the formula ##STR12##
References Cited (Backward Citations)
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-02 | 1984-06-02 | 1984-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-02 | 1988-06-02 | 1988-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-02 | 1992-06-02 | 1992-12-02 | $7700.00 | Window Closed / Lapsed |