US2805236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2, 4-di (formyl) cyclopentyltriorganosilanes and process for their preparation
Assignee: Union Carbide Corp
•
Filing: 1955-03-28
•
Granted: 1957-09-03
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Expires: 1975-03-28
Abstract
No abstract record available.
Inventors
- 👤 Alfred D Kiffer
- 👤 William T Black
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:51
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1804; C07F7/0803; C07F7/081
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
9 words
2,4 - DI(FORMLY) CYCLOPENTYLTRIORGANOSILANES REPRESENTED BY THE GRAPHIC FORMULA:
Claim 2
Dependent Claim
9 words
2,4 - DI(FORMLY) CYCLOPENTYLTRIORGANOSILANES REPRESENTED BY THE GRAPHIC FORMULA:
Claim 3
Dependent Claim
11 words
A PROCESS FOR PREPARING A 2,4-DI(FORMLY) CYCLOPENTYLTRIORGANOSILANE, REPRESENTED BY THE FORMULA:
Claim 4
Dependent Claim
11 words
A PROCESS FOR PREPARING A 2,4-DI(FORMLY) CYCLOPENTYLTRIORGANOSILANE, REPRESENTED BY THE FORMULA:
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) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |