US3829404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of synthetic polymers with certain piperidino-thiazoline compounds
Assignee: Sankyo Co Ltd
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Filing: 1972-10-20
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Granted: 1974-08-13
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Expires: 1992-10-20
Abstract
Abstract SYNTHETIC POLYMER COMPOSITIONS, PARTICULARYL POLYURETHANE COMPOSITIONS, STABILIZED AGAINST THEIR DETERIORATIONS WHICH CONTAIN AT LEAST ONE OF 6-SUBSTITUTED OR UNSUBSTITURED-5,5,7,7-TETRAMETHLPIPERIDINO-(5,4 = C)->3-TIAZOLINE2-SPIRO-4''-(1''-SUBSTITUTED OR UNSUBSTITUTED-2'',2'',6'',6''-TETRAMETHYLPIPERIDINE) COMPOUNDS. SUCH PIPERIDINO-TRIAZOLINE COMPOUNDS ARE PREPARED BY REACTING THE CORRESPONDING 2,2,6,6-TETRAMETHYL-PIPERIDINO-(5.4-C) ->3- THIAZOLINE-2-SPIROFUR UNDER THE STREAM OF GASEOUS NH3 OR BY REACTING 5,57,7-TETRAMETHYLPIPERIDINO-(5.4-C) ->3-THIAZOLINE-2-SPIRO4''-(2'',2'',6'',6''-TETRAMETHYLPIPERIDINE) WITH THE CORRESPONDING HALIDE.
Inventors
- 👤 H Horiuchi
- 👤 K Matsui
- 👤 K Murayama
- 👤 S Morimura
- 👤 T Kurumada
- 👤 N Ohta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:21
CPC Classifications
C; C07; C07D; C07D513/00; C07D513/12; C07D513/20; C08; C08K; C08K5/00; C08K5/36; C08K5/45; C08K5/46
Claims Analysis
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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) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |