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US4012375A
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Silacyclopentenyl-bis-epsilon-caprolactam
Assignee: Dow Silicones Corp
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Filing: 1975-12-29
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Granted: 1977-03-15
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Expires: 1995-12-29
Abstract
Abstract Silacyclopentenyl-bis-epsilon-caprolactam, ##STR1## is useful as a chain extender for hydroxyl compounds, especially hydroxyl endblocked polydimethylsiloxanes.
Inventors
- 👤 James R. Hahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:18
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/20; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/10; C08K; C08K5/00; C08K5/54; C08G77/14; C08G77/16; Y; Y10; Y10S; Y10S528/00; Y10S528/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
1 words
Silacyclopentenyl-bis-epsilon-caprolactam.
Claim 2
Dependent Claim
1 words
Silacyclopentenyl-bis-epsilon-caprolactam.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-14 | 1980-09-13 | 1981-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-14 | 1984-09-13 | 1985-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-14 | 1988-09-13 | 1989-03-15 | $7700.00 | Window Closed / Lapsed |