US2974388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making ceramic shells
Assignee: Saint Gobain Abrasives Inc
•
Filing: 1958-01-30
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Granted: 1961-03-14
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Expires: 1978-01-30
Abstract
No abstract record available.
Inventors
- 👤 Neil N Ault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:04
CPC Classifications
F; F42; F42B; F42B10/00; F42B10/32; F42B10/38; F42B10/42; F42B10/46; C; C04; C04B; C04B35/00; C04B35/622; C04B35/653; C23; C23C; C23C4/00; C23C4/18; C23C4/185; F42B12/00; F42B12/72; F42B12/76; Y; Y02; Y02T; Y02T50/00; Y02T50/60; Y10; Y10S; Y10S264/00; Y10S264/44; Y10S264/72
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-13 | 1964-09-12 | 1965-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-13 | 1968-09-12 | 1969-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-13 | 1972-09-12 | 1973-03-14 | $7700.00 | Window Closed / Lapsed |