Patent US2947771A successfully refreshed from Google Patents.
US2947771A
Expired / Lapsed
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Aminoalkylpolysiloxanes and process for their production
Assignee: Union Carbide Corp
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Filing: 1956-10-12
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Granted: 1960-08-02
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Expires: 1976-10-12
Abstract
No abstract record available.
Inventors
- 👤 Donald L Bailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:36
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/22; C08G77/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
END-BLOCKED POLYSILOXANES COMPOSED OF 1 TO 30 SILOXANE UNITS HAVING THE FORMULA:
Claim 2
Dependent Claim
12 words
END-BLOCKED POLYSILOXANES COMPOSED OF 1 TO 30 SILOXANE UNITS HAVING THE FORMULA:
References Cited (Backward Citations)
US2469888A
Cited
US2489138A
Cited
US2557803A
Cited
US2754311A
Cited
US2838515A
Cited
US2762823A
Cited
US2819245A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |