US3578470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bao-al2o3-sio2 glass-ceramic materials
Assignee: GORDON P K CHU
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Filing: 1968-11-12
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Granted: 1971-05-11
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Expires: 1988-11-12
Abstract
Abstract THIS INVENTION RELATES TO THE PRODUCTION OF GLASS-CERAMIC MATERIALS IN THE COMPOSITION FIELD BAO-AL2O3-SIO2 NUCLEATED WITH TA2O5 AND/OR NB3O5 WHICH ARE ESPECIALLY SUITABLE FOR SEALING TO TUNGSTEN AND/OR MOLYBDENUM METAL AND THEIR ALLOYS.
Inventors
- 👤 Dov Bahat
- 👤 Gordon P K Chu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:53
CPC Classifications
C; C03; C03C; C03C10/00; C03C10/0036; C03C27/00; C03C27/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |