US2883366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quaternary phosphonium compounds as polymerization catalysts for siloxanes
Assignee: General Electric Co
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Filing: 1954-12-10
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Granted: 1959-04-21
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Expires: 1974-12-10
Abstract
No abstract record available.
Inventors
- 👤 Simon W Kantor
- 👤 Alfred R Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:10
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/06; C08G77/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
19 words
THE PROCESS OF INCREASING THE MOLECULAR WEIGHT OF AN ORGANOPOLYSILOXANE WHICH COMPRISES CONTACTING AN ORGANOPOLYSILOXANE HAVING THE AVERAGE FORMULA
Claim 2
Dependent Claim
14 words
A COMPOSITION OF MATTER COMPRISING A MIXTURE OF AN ORGANOPOLYSILOXANE HAVING THE AVERAGE FORMULA
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) | 1962-04-20 | 1962-10-20 | 1963-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-20 | 1966-10-20 | 1967-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-20 | 1970-10-20 | 1971-04-21 | $7700.00 | Window Closed / Lapsed |