US2830967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for polymerizing polyorganosiloxanes with phosphorus-nitrogen compounds
Assignee: Wacker Chemie AG
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Filing: 1953-12-23
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Granted: 1958-04-15
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Expires: 1973-12-23
Abstract
No abstract record available.
Inventors
- 👤 Nitzsche Siegfried
- 👤 Manfred H Wick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:22
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/06; C08G77/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
THE METHOD OF POLYMERIZING A LIQUID ORGANOSILOXANE HAVING AN AVERAGE DEGREE OF SUBSTITUTION OF FROM 1.9 TO 2.1 ORGANIC GROUPS ATTACHED TO SILICON BY C-SI LINKAGE PER SILICON ATOM COMPRISING CONTACTING THE SILOXANE WITH A PHOSPHORUS-NITROGEN COMPOUND SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF THE GENERAL FORMULAE:
Claim 2
Independent Claim
48 words
THE METHOD OF POLYMERIZING A LIQUID ORGANOSILOXANE HAVING AN AVERAGE DEGREE OF SUBSTITUTION OF FROM 1.9 TO 2.1 ORGANIC GROUPS ATTACHED TO SILICON BY C-SI LINKAGE PER SILICON ATOM COMPRISING CONTACTING THE SILOXANE WITH A PHOSPHORUS-NITROGEN COMPOUND SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF THE GENERAL FORMULAE:
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) | 1961-04-14 | 1961-10-14 | 1962-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-14 | 1965-10-14 | 1966-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-14 | 1969-10-14 | 1970-04-15 | $7700.00 | Window Closed / Lapsed |