US2759007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High pressure polymerization of dialkylcyclosiloxanes in the presence of a basic catalyst
Assignee: Union Carbide Corp
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Filing: 1953-06-10
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Granted: 1956-08-14
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Expires: 1973-06-10
Abstract
No abstract record available.
Inventors
- 👤 Jr Milton L Dunham
- 👤 George H Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:06
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
A PROCESS FOR POLYMERIZING A DIALKYLCYCLOSILOXANE TO A DIALKYLSILOXANE POLYMER WITH AN ALKALINE CATALYST UNDER SAID DIALKYLCYCLOSILOXANE WITH AN ALKALINE CATALYST UNDER AN APPLIED PRESSURE OF AT LEAST 1500 POUNDS PER SQUARE INCH UNTIL SAID DIALKYLCYCLOSILANE IS POLYMERIXZED.
Claim 2
Dependent Claim
38 words
A PROCESS FOR POLYMERIZING A DIALKYLCYCLOSILOXANE TO A DIALKYLSILOXANE POLYMER WITH AN ALKALINE CATALYST UNDER SAID DIALKYLCYCLOSILOXANE WITH AN ALKALINE CATALYST UNDER AN APPLIED PRESSURE OF AT LEAST 1500 POUNDS PER SQUARE INCH UNTIL SAID DIALKYLCYCLOSILANE IS POLYMERIXZED.
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) | 1959-08-14 | 1960-02-13 | 1960-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-14 | 1964-02-13 | 1964-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-14 | 1968-02-13 | 1968-08-14 | $7700.00 | Window Closed / Lapsed |