US3537949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Investment shell molds for the high integrity precision casting of reactive and refractory metals,and methods for their manufacture
Assignee: Selmet Inc
•
Filing: 1968-08-07
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Granted: 1970-11-03
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Expires: 1988-08-07
Abstract
No abstract record available.
Inventors
- 👤 Robert A Brown
- 👤 Clifford A Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:16
CPC Classifications
B; B22; B22C; B22C9/00; B22C9/02; B22C9/04; B22C1/00; B22C1/16; B22C1/165; B22C1/18; B22C1/20; B22C1/205; B22C3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1347481A
Cited
US2510735A
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US2806271A
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US2887392A
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US3259948A
Cited
US3279028A
Cited
US3340026A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |