US2741817A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat disposable pattern for molding a blade cavity
Assignee: Universal Castings Corp
•
Filing: 1950-08-03
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Granted: 1956-04-17
•
Expires: 1970-08-03
Abstract
No abstract record available.
Inventors
- 👤 William G Wilkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:30
CPC Classifications
B; B22; B22C; B22C9/00; B22C9/02; B22C9/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
123 words
A HEAT DISPOSABLE PATTERN USED FOR MOLDING A BLADE CAVITY IN A CORE, SAID PATTERN BEING FORMED OF A THERMOPLASTIC MATERIAL AND COMPRISING A CURVED BLADE BODY, A TRANSVERSE FLANGE INTEGRAL WITH AT LEAST ONE SIDE OF SAID BLADE BODY, THE OPPOSITE END EDGES OF SAID FLANGE BEING OF COMPLEMENTAL SHAPE AND CONFORMING TO THE SHAPE OF THE ADJACENT SIDE OF SAID BODY SO THAT A SERIES OF THE BLADES MAY BE ASSEMBLED IN ANNULAR SPACED RELATION IN A CORE BOX, WITH THE FLANGES AT SAID ONE SIDE OF THE BLADE BODIES OF THE SERIES IN END ABUTMENT TO FORM A CLOSED ANNULUS AT SAID ONE SIDE OF SAID BODIES, SAID FLANGES OF THE SERIES OF BODIES SERVING TO SPACE SAID BLADE BODIES.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-17 | 1959-10-17 | 1960-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-17 | 1963-10-17 | 1964-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-17 | 1967-10-17 | 1968-04-17 | $7700.00 | Window Closed / Lapsed |