US2676182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymeric siloxanes and methods of preparing them
Assignee: Dow Silicones Corp
•
Filing: 1950-09-13
•
Granted: 1954-04-20
•
Expires: 1970-09-13
Abstract
No abstract record available.
Inventors
- 👤 Daudt William Herbert
- 👤 Tyler Junior Leslie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:54
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
A METHOD OF PREPARING COPOLYMERIC SILOXANES WHICH COMPRISES REACTING AN ORGANO SILICON COMPOSITION COMPOSED OF COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF RNSIX4-N AND
Claim 2
Independent Claim
24 words
A METHOD OF PREPARING COPOLYMERIC SILOXANES WHICH COMPRISES REACTING AN ORGANO SILICON COMPOSITION COMPOSED OF COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF RNSIX4-N AND
References Cited (Backward Citations)
US2458944A
Cited
US2486162A
Cited
US2441320A
Cited
US2441422A
Cited
US2521390A
Cited
US2562953A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-19 | 1957-10-19 | 1958-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-19 | 1961-10-19 | 1962-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-19 | 1965-10-19 | 1966-04-20 | $7700.00 | Window Closed / Lapsed |