US4725634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilizer for synthetic resins
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1986-04-16
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Granted: 1988-02-16
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Expires: 2006-04-16
Abstract
Abstract A stabilizer for synthetic resins containing as an effective ingredient a hindered piperidine compound represented by the general formula: ##STR1## wherein R 1 represents a C 1 -C 18 alkyl group, R 2 represents a hydrogen atom or a C 1 -C 4 alkyl group, n represents an integer of 1 to 12, and C n H 2n represents a straight-chain or branched alkylene group.
Inventors
- 👤 Tamaki Ishii
- 👤 Shinichi Yachigo
- 👤 Haruki Okamura
- 👤 Yuzo Maegawa
- 👤 Eizo Okino
- 👤 Yukoh Takahashi
- 👤 Hiroki Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:02
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432; C08K5/3435
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
65 words
A stabilizer for synthetic resins containing as an effective ingredient a hindered piperidine compound represented by the general formula, ##STR7## wherein R 1 represents a C 1 -C 18 alkyl group, R 2 represents a hydrogen atom or a C 1 -C 4 alkyl group, n represents an integer of 1 to 12, and C n H 2n represents a straight-chain or branched alkylene group.
Claim 2
Dependent Claim
65 words
A stabilizer for synthetic resins containing as an effective ingredient a hindered piperidine compound represented by the general formula, ##STR7## wherein R 1 represents a C 1 -C 18 alkyl group, R 2 represents a hydrogen atom or a C 1 -C 4 alkyl group, n represents an integer of 1 to 12, and C n H 2n represents a straight-chain or branched alkylene group.
Claim 3
Dependent Claim
35 words
A stabilizer as claimed in claim 1 wherein R 1 is a C 1 -C 11 alkyl group, R 2 is hydrogen atom or methyl group and n is an integer of 3 to 10.
Claim 4
Dependent Claim
31 words
A stabilizer as claimed in claim 1 wherein R 1 is a C 1 -C 4 alkyl, R 2 is hydrogen atom and n is an integer of 3 to 6.
References Cited (Backward Citations)
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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) | 1991-02-15 | 1991-08-17 | 1992-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-15 | 1995-08-17 | 1996-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-15 | 1999-08-17 | 2000-02-16 | $7700.00 | Window Closed / Lapsed |