US3139656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pattern for investment mold and mold made therefrom
Assignee: Precision Metalsmiths Inc
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Filing: 1961-10-06
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Granted: 1964-07-07
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Expires: 1981-10-06
Abstract
No abstract record available.
Inventors
- 👤 Claude H Watts
- 👤 Robert R Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:09
CPC Classifications
B; B22; B22C; B22C9/00; B22C9/02; B22C9/04; B22C7/00; B22C7/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
73 words
A REFRACTORY MOLD SUITABLE FOR CASTING MOLTEN MATERIAL COMPRISING A FIRST TUBULAR SPRUE PASSAGEWAY, A PLURALITY OF PATTERN CAVITIES AROUND SAID FIRST PASSAGEWAY AND IN COMMUNICATION THEREWITH, A SECOND TUBULAR SPRUE PASSAGEWAY SURROUNDED BY SAID FIRST SPRUE PASSAGEWAY, A PLURALITY OF PATTERN CAVITIES BETWEEN SAID PASSAGEWAYS AND IN COMMUNICATION WITH SAID SECOND PASSAGEWAY, AND A POURING CUP HAVING UPPER AND LOWER POURING LEVELS IN RESPECTIVE COMMUNICATION WITH SAID FIRST AND SECOND SPRUE PASSAGEWAYS.
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) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |