Patent US4332731A successfully refreshed from Google Patents.
US4332731A
Expired / Lapsed
US
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2-Methylene-1,4,6-trioxaspiro[4,6]undecane, process for the preparation thereof and process for the preparation of polymers
Assignee: Toagosei Co Ltd
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Filing: 1980-09-17
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Granted: 1982-06-01
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Expires: 2000-09-17
Abstract
Abstract Novel 2-methylene-1,4,6-trioxaspiro[4,6]undecane has both cationic polymerizability and radical ring-opening polymerizability, and it can be produced by reacting a 2-halomethyl-1,4,6-trioxaspiro[4,6]undecane with an alkali to effect dehydrohalogenation.
Inventors
- 👤 Takeshi Endo
- 👤 Takahisa Ogasawara
- 👤 Kiyokazu Mizutani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:30
CPC Classifications
C; C07; C07D; C07D493/00; C07D493/02; C07D493/10; C08; C08G; C08G63/00; C08G63/02; C08G63/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
1 words
2-Methylene-1,4,6-trioxaspiro[4,6]undecane.
Claim 2
Dependent Claim
1 words
2-Methylene-1,4,6-trioxaspiro[4,6]undecane.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-31 | 1985-11-30 | 1986-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-31 | 1989-11-30 | 1990-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-31 | 1993-11-30 | 1994-06-01 | $7700.00 | Window Closed / Lapsed |