US3540894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Eutectic lead bisilicate ceramic compositions and fired ceramic bodies
Assignee: International Business Machines Corp
•
Filing: 1967-03-29
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Granted: 1970-11-17
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Expires: 1987-03-29
Abstract
No abstract record available.
Inventors
- 👤 Charles M Mcintosh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:49
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/13; C04B33/1315
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3125618A
Cited
US1749642A
Cited
US2803554A
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US2836501A
Cited
US2898217A
Cited
US3293077A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-16 | 1974-05-18 | 1974-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-16 | 1978-05-18 | 1978-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-16 | 1982-05-18 | 1982-11-17 | $7700.00 | Window Closed / Lapsed |