Patent US3913948A successfully refreshed from Google Patents.
Patent US3111535A successfully refreshed from Google Patents.
US3111535A
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Method of copolymerization
Assignee: Wacker Chemie AG
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Filing: 1961-03-15
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Granted: 1963-11-19
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Expires: 1981-03-15
Abstract
No abstract record available.
Inventors
- 👤 Nitzsche Siegfried
- 👤 Pirson Ewald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:55
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/42; C08G77/46; Y; Y10; Y10S; Y10S516/00; Y10S516/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
THE METHOD CONSISTING ESSENTIALLY OF CONCONDENSING AT LEAST ONE ORGANOPOLYSILOXANE OF THE UNIT FORMULA RN-SI-O((4-N)/2) WHEREIN R IS A MONOVALENT HYDROCARBON RADICAL AND N HAS AN AVERAGE VALUE OF FROM 1.0 TO 3.0 WITH AT LEAST ONE POLYGLYCOL SELECTED FROM THE GROUP CONSISTING OF
Claim 2
Independent Claim
44 words
THE METHOD CONSISTING ESSENTIALLY OF CONCONDENSING AT LEAST ONE ORGANOPOLYSILOXANE OF THE UNIT FORMULA RN-SI-O((4-N)/2) WHEREIN R IS A MONOVALENT HYDROCARBON RADICAL AND N HAS AN AVERAGE VALUE OF FROM 1.0 TO 3.0 WITH AT LEAST ONE POLYGLYCOL SELECTED FROM THE GROUP CONSISTING OF
References Cited (Backward Citations)
US2746982A
Cited
US2990377A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-11-18 | 1967-05-20 | 1967-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-18 | 1971-05-20 | 1971-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-18 | 1975-05-20 | 1975-11-19 | $7700.00 | Window Closed / Lapsed |