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Patent US3268570A successfully refreshed from Google Patents.
US3268570A
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Preparation of cyclic hydroxylated siloxanes
Assignee: Dow Silicones Corp
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Filing: 1962-03-29
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Granted: 1966-08-23
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Expires: 1982-03-29
Abstract
No abstract record available.
Inventors
- 👤 Donald R Weyenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:00
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/21; C07F7/08; C07F7/0834; C07F7/0838; C07F7/0872; C07F7/0876
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
10 words
A PROCESS FOR MAKING A CYCLIC SILOXANE OF THE FORMULA
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) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |