Patent US4940050A successfully refreshed from Google Patents.
US3155477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fabricating intricate internal shapes
Assignee: Unisys Corp
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Filing: 1961-08-25
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Granted: 1964-11-03
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Expires: 1981-08-25
Abstract
No abstract record available.
Inventors
- 👤 Richard E Swarts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:22
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/04; C03B23/07; C03B23/073; C03B23/076; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4981
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A METHOD OF FABRICATING INTRICATELY SHAPED STRUCTURES INCLUDING THE STEPS OF FORMING A POROUS MANDREL OF A MATERIAL WHICH IS PERMEABLE WITH RESPECT TO GASES AND WHICH MAY BE WASHED OUT FROM THE INTERIOR OF THE FINISHED STRUCTURE INTO THE SHAPE OF THE DESIRED STRUCTURE, FORMING THE DESIRED STRUCTURE INTO A SHAPE TO PERMIT INSERTION OF THE MANDREL, INSERTING THE MANDREL WITHIN SAID STRUCTURE, HEATING THE STRUCTURE AROUND THE MANDREL TO SOFTNESS, SAID MANDREL MATERIAL MAINTAINING A SOLID CONFIGURATION DURING SAID HEATING, DRAWING A VACUUM ON THE INTERIOR OF THE STRUCTURE THROUGH THE POROUS MANDREL THEREBY CAUSING THE INTERIOR OF THE STRUCTURE TO CONFORM TO THE SHAPE OF THE MANDREL, AND WASHING OUT THE REMOVABLE MANDREL FROM WITHIN THE INTERIOR OF THE FINISHED STRUCTURE.
Claim 2
Independent Claim
124 words
A METHOD OF FABRICATING INTRICATELY SHAPED STRUCTURES INCLUDING THE STEPS OF FORMING A POROUS MANDREL OF A MATERIAL WHICH IS PERMEABLE WITH RESPECT TO GASES AND WHICH MAY BE WASHED OUT FROM THE INTERIOR OF THE FINISHED STRUCTURE INTO THE SHAPE OF THE DESIRED STRUCTURE, FORMING THE DESIRED STRUCTURE INTO A SHAPE TO PERMIT INSERTION OF THE MANDREL, INSERTING THE MANDREL WITHIN SAID STRUCTURE, HEATING THE STRUCTURE AROUND THE MANDREL TO SOFTNESS, SAID MANDREL MATERIAL MAINTAINING A SOLID CONFIGURATION DURING SAID HEATING, DRAWING A VACUUM ON THE INTERIOR OF THE STRUCTURE THROUGH THE POROUS MANDREL THEREBY CAUSING THE INTERIOR OF THE STRUCTURE TO CONFORM TO THE SHAPE OF THE MANDREL, AND WASHING OUT THE REMOVABLE MANDREL FROM WITHIN THE INTERIOR OF THE FINISHED STRUCTURE.
References Cited (Backward Citations)
US2084811A
Cited
US2282355A
Cited
US2415412A
Cited
US3091104A
Cited
US2935579A
Cited
US3091105A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |