Patent US2863897A successfully refreshed from Google Patents.
US2863897A
Expired / Lapsed
US
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Method of preparing hydroxyl endblocked organopolysiloxane fluids
Assignee: Dow Silicones Corp
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Filing: 1955-06-23
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Granted: 1958-12-09
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Expires: 1975-06-23
Abstract
No abstract record available.
Inventors
- 👤 Jack R Wehrly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:35
CPC Classifications
C; C08; C08G; C08G77/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
19 words
A METHOD WHICH COMPRISES HEATING IN A CLOSED SYSTEM A MIXTURE OF (1) AN ORGANOSILOXANE OF THE UNIT FORMULA
Claim 2
Independent Claim
19 words
A METHOD WHICH COMPRISES HEATING IN A CLOSED SYSTEM A MIXTURE OF (1) AN ORGANOSILOXANE OF THE UNIT 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) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |