US3280214A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organosiloxane block copolymers
Assignee: Dow Silicones Corp
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Filing: 1963-09-18
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Granted: 1966-10-18
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Expires: 1983-09-18
Abstract
No abstract record available.
Inventors
- 👤 Darrell D Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:42
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/10; C08G; C08G77/00; C08G77/42; C08G77/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
A METHOD OF PRODUCING A SILICON-CONTAINING BLOCK COPOLYMER CONSISTING ESSENTIALLY OF (A) REACTING AN INERT ORGANIC SOLVENT SOLUTION OF (1) AN ORGANOPOLYSILOXANE OF THE GENERAL FORMULA
Claim 2
Independent Claim
26 words
A METHOD OF PRODUCING A SILICON-CONTAINING BLOCK COPOLYMER CONSISTING ESSENTIALLY OF (A) REACTING AN INERT ORGANIC SOLVENT SOLUTION OF (1) AN ORGANOPOLYSILOXANE OF THE GENERAL FORMULA
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) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |