US3401227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liner for crucibles
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1966-02-09
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Granted: 1968-09-10
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Expires: 1986-02-09
Abstract
No abstract record available.
Inventors
- 👤 Barry O Dunlevy
- 👤 Jr Leslie E Harper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:26
CPC Classifications
F; F27; F27B; F27B14/00; F27B14/06; F27B14/061; F27B14/08; F27B14/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-10 | 1972-03-11 | 1972-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-10 | 1976-03-11 | 1976-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-10 | 1980-03-11 | 1980-09-10 | $7700.00 | Window Closed / Lapsed |