US3540899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Basic fused refractory material
Assignee: Saint Gobain Ceramics and Plastics Inc
•
Filing: 1967-12-26
•
Granted: 1970-11-17
•
Expires: 1987-12-26
Abstract
No abstract record available.
Inventors
- 👤 Allen M Alper
- 👤 Robert C Doman
- 👤 Robert N Mcnally
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:22
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2310591A
Cited
US3342616A
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 |