Patent US3445554A successfully refreshed from Google Patents.
US3445554A
Expired / Lapsed
US
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Manufacture of silicon carbide ribbons
Assignee: Dow Silicones Corp
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Filing: 1966-03-11
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Granted: 1969-05-20
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Expires: 1986-03-11
Abstract
No abstract record available.
Inventors
- 👤 George A Jerome
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:33
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/56; C04B35/565; C01; C01B; C01B32/00; C01B32/90; C01B32/914; C01B32/956; C01B32/963; C01B32/984; C23; C23C; C23C16/00; C23C16/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA657304A
Cited
US2187086A
Cited
US2677627A
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US3218382A
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US3175884A
Cited
US3294880A
Cited
US3382574A
Cited
US3255284A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-19 | 1972-11-18 | 1973-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-19 | 1976-11-18 | 1977-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-19 | 1980-11-18 | 1981-05-20 | $7700.00 | Window Closed / Lapsed |