Patent US3453307A successfully refreshed from Google Patents.
US3453307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparation of isopropenoxy-silicon compounds
Assignee: Wacker Chemie AG
•
Filing: 1966-09-26
•
Granted: 1969-07-01
•
Expires: 1986-09-26
Abstract
No abstract record available.
Inventors
- 👤 Siegfried Nitzsche
- 👤 Paul Buchheit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:32
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A METHOD FOR INTRODUCING ISOPROPENOXY GROUPS INTO SILICON COMPOUNDS COMPRISING ADMIXING A SILICON COMPOUND HAVING AT LEAST ONE CHLORINE ATOMBONDED TO SILICON IN EACH MOLECULE WITH METALLIC SODIUM AND ACETONE IN AN ESSENTIALLY INERT ATMOSPHERE, AT A TEMPERATURE NOT EXCEEDING +10*C.
Claim 2
Independent Claim
41 words
A METHOD FOR INTRODUCING ISOPROPENOXY GROUPS INTO SILICON COMPOUNDS COMPRISING ADMIXING A SILICON COMPOUND HAVING AT LEAST ONE CHLORINE ATOMBONDED TO SILICON IN EACH MOLECULE WITH METALLIC SODIUM AND ACETONE IN AN ESSENTIALLY INERT ATMOSPHERE, AT A TEMPERATURE NOT EXCEEDING +10*C.
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) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |