US2913471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of tetraorganosilanes by pyrolysis of alkylsilsesquioxanes
Assignee: General Electric Co
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Filing: 1956-04-18
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Granted: 1959-11-17
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Expires: 1976-04-18
Abstract
No abstract record available.
Inventors
- 👤 Philip D George
- 👤 Paul D Zemany
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:01
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0803; C07F7/0825; C07F7/0827
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A PROCESS OF PREPARING TETRAALKYLSILANES WHICH COMPRISES PYROLYSING AT A TEMPERATURE OF 250-600*C. A MEMBER SELECTED FROM THE GROUP CONSISTING OF ALKYLSILSESQUIOXANES AND THE ALKALI METAL SALT THEREOF AT A PRESSURE OF GREATER THAN 100MM., SAID ALKYL GROUP BEING A LOWER ALKYL RADICAL.
Claim 2
Dependent Claim
43 words
A PROCESS OF PREPARING TETRAALKYLSILANES WHICH COMPRISES PYROLYSING AT A TEMPERATURE OF 250-600*C. A MEMBER SELECTED FROM THE GROUP CONSISTING OF ALKYLSILSESQUIOXANES AND THE ALKALI METAL SALT THEREOF AT A PRESSURE OF GREATER THAN 100MM., SAID ALKYL GROUP BEING A LOWER ALKYL RADICAL.
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) | 1962-11-16 | 1963-05-18 | 1963-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-16 | 1967-05-18 | 1967-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-16 | 1971-05-18 | 1971-11-17 | $7700.00 | Window Closed / Lapsed |