US2831008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of silicone oils
Assignee: Bayer AG
•
Filing: 1955-02-14
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Granted: 1958-04-15
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Expires: 1975-02-14
Abstract
No abstract record available.
Inventors
- 👤 Knopf Herbert
- 👤 Beerwald Alexander
- 👤 Brinkmann Georg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:03
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/06; C08G77/08; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0838; C07F7/0872; C07F7/0874; C08G77/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A PROCESS FOR THE MANUFACTURE OF STABLE SILOXANES BY REACTION OF A MEMBER OF THE GROUP CONSISTING OF CYCLIC SILOXANES, SILOXANES CONTAINING SILANOL GROUPS AND MIXTURES OF THESE SILOXANES WITH COMPOUNDS CONTAINING MONOFUNCTIONAL SILYL GROUPS, WHICH COMPRISES CARRYING OUT THE REACTION IN THE PRESENCE OF A SOLID CATION EXCHANGER WHICH PRIOR TO USE HAS BEEN TREATED WITH ACIDS AND WASHED UNTIL NEUTRAL REACTION IS OBTAINED.
Claim 2
Dependent Claim
65 words
A PROCESS FOR THE MANUFACTURE OF STABLE SILOXANES BY REACTION OF A MEMBER OF THE GROUP CONSISTING OF CYCLIC SILOXANES, SILOXANES CONTAINING SILANOL GROUPS AND MIXTURES OF THESE SILOXANES WITH COMPOUNDS CONTAINING MONOFUNCTIONAL SILYL GROUPS, WHICH COMPRISES CARRYING OUT THE REACTION IN THE PRESENCE OF A SOLID CATION EXCHANGER WHICH PRIOR TO USE HAS BEEN TREATED WITH ACIDS AND WASHED UNTIL NEUTRAL REACTION IS OBTAINED.
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) | 1961-04-14 | 1961-10-14 | 1962-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-14 | 1965-10-14 | 1966-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-14 | 1969-10-14 | 1970-04-15 | $7700.00 | Window Closed / Lapsed |