US3390212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making lightweight fired ceramic bodies
Assignee: RUSSELL T STELLE
•
Filing: 1966-11-14
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Granted: 1968-06-25
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Expires: 1986-11-14
Abstract
No abstract record available.
Inventors
- 👤 Russell T Stelle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:26
CPC Classifications
C; C04; C04B; C04B38/00; C04B38/06; C04B38/063; C04B38/0635; C04B38/0645
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB805844A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-25 | 1971-12-25 | 1972-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-25 | 1975-12-25 | 1976-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-25 | 1979-12-25 | 1980-06-25 | $7700.00 | Window Closed / Lapsed |