Patent US2983745A successfully refreshed from Google Patents.
US2983745A
Expired / Lapsed
US
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Silpropoxanes
Assignee: Dow Silicones Corp
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Filing: 1956-07-18
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Granted: 1961-05-09
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Expires: 1976-07-18
Abstract
No abstract record available.
Inventors
- 👤 John L Speier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:00
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/48; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1804
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
17 words
THE METHOD WHICH COMPRISES REACTING AT A TEMPERATURE OF AT LEAST 80*C. A SILANE OF THE FORMULA
Claim 2
Independent Claim
17 words
THE METHOD WHICH COMPRISES REACTING AT A TEMPERATURE OF AT LEAST 80*C. A SILANE OF THE FORMULA
Claim 3
Dependent Claim
56 words
A COPOLYMERIC ORGANOSILICON COMPOUND N WHICH FROM 1 TO 99 MOLAR PERCENT OF THE POLYMERIC UNITS ARE OF THE FORMULA (-SIRR''CH2CH2CH2O-), WHERE R IS SELECTED FROM THE GROUP CONSISTING OF METHYL, ETHYL, AND PHENYL RADICALS AND R'' IS SELECTED FROM THE GROUP CONSISTING OF METHYL AND ETHYL RADICALS, AND THE REMAINING UNITS ARE OF THE FORMULA
Claim 4
Dependent Claim
56 words
A COPOLYMERIC ORGANOSILICON COMPOUND N WHICH FROM 1 TO 99 MOLAR PERCENT OF THE POLYMERIC UNITS ARE OF THE FORMULA (-SIRR''CH2CH2CH2O-), WHERE R IS SELECTED FROM THE GROUP CONSISTING OF METHYL, ETHYL, AND PHENYL RADICALS AND R'' IS SELECTED FROM THE GROUP CONSISTING OF METHYL AND ETHYL RADICALS, AND THE REMAINING UNITS ARE OF THE FORMULA
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) | 1964-05-08 | 1964-11-07 | 1965-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-08 | 1968-11-07 | 1969-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-08 | 1972-11-07 | 1973-05-09 | $7700.00 | Window Closed / Lapsed |