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US2439856A
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Dimethyl silicone polymers and methods of making them
Assignee: Corning Glass Works
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Filing: 1943-06-10
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Granted: 1948-04-20
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Expires: 1963-06-10
Abstract
No abstract record available.
Inventors
- 👤 Mcgregor Rob Roy
- 👤 Warrick Earl Leathen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:22
CPC Classifications
C; C08; C08G; C08G77/00; C07; C07F; C07F7/00; C07F7/02; C07F7/21; C10; C10N; C10N2040/00; C10N2040/30; C10N2040/32; C10N2040/34; C10N2040/36; C10N2040/38; C10N2040/40; C10N2040/42; C10N2040/44; C10N2040/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2258218A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-20 | 1951-10-20 | 1952-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-20 | 1955-10-20 | 1956-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-20 | 1959-10-20 | 1960-04-20 | $7700.00 | Window Closed / Lapsed |