US2521673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of organo-siloxane polymers
Assignee: Dow Chemical Co
•
Filing: 1946-07-08
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Granted: 1950-09-12
•
Expires: 1966-07-08
Abstract
No abstract record available.
Inventors
- 👤 Edgar C Britton
- 👤 Luther F Berhenke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:52
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
26 words
THE METHOD OF PREPARING AN ORGANO-SILOXANE POLYMER WHICH COMPRISES ADMIXING WITH A HYDROLYZABLE HYDROCARBON-HALOSILANE, AND HEATING THE MIXTURE AT A REACTION TEMPERATURE BETWEEN 50* TO 120*C.
References Cited (Backward Citations)
US2398672A
Cited
US2383827A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-11 | 1954-03-13 | 1954-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-11 | 1958-03-13 | 1958-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-11 | 1962-03-13 | 1962-09-12 | $7700.00 | Window Closed / Lapsed |