US2957899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkaline hydrolysis of cyanoalkyl-siloxanes
Assignee: Union Carbide Corp
•
Filing: 1956-10-12
•
Granted: 1960-10-25
•
Expires: 1976-10-12
Abstract
No abstract record available.
Inventors
- 👤 William T Black
- 👤 Donald L Bailey
- 👤 Victor B Jex
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:16
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C08; C08G; C08G77/00; C08G77/04; C08G77/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
PROCESS FOR THE PRODUCTION OF POLYSILOXANES REPRESENTED BY THE UNIT FORMULA:
Claim 2
Dependent Claim
11 words
PROCESS FOR THE PRODUCTION OF POLYSILOXANES REPRESENTED BY THE UNIT FORMULA:
References Cited (Backward Citations)
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US2721856A
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Cited
FR1116726A
Cited
US2723987A
Cited
US2855381A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |