US3294718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing block copolymers
Assignee: Dow Silicones Corp
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Filing: 1964-04-20
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Granted: 1966-12-27
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Expires: 1984-04-20
Abstract
No abstract record available.
Inventors
- 👤 Robert C Antonen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:48
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/10; C08G; C08G77/00; C08G77/04; C08G77/06; C08G77/42; C08G77/44
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
25 words
THE METHOD OF PEPARING AN ORGANOSILICON BLOCK COPOLYMER COMPRISING (I) MIXING WITH SUFFICIENT AGITATION TO FORM A DISPERSION, (A) A DIORGANOPOLYSILOXANE OF THE GENERAL FORMULA
References Cited (Backward Citations)
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US3225419A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |