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US2989559A
Expired / Lapsed
US
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Carbonyl-containing organopolysiloxanes
Assignee: Union Carbide Corp
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Filing: 1958-06-27
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Granted: 1961-06-20
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Expires: 1978-06-27
Abstract
No abstract record available.
Inventors
- 👤 James G Marsden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:19
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/38; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0838
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
A SILOXANE CONTAINING AT LEAST ONE UNIT OF THE FORMULA
Claim 2
Dependent Claim
10 words
A SILOXANE CONTAINING AT LEAST ONE UNIT OF THE 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) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |