US3255281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propellant casting method
Assignee: North American Aviation Corp
•
Filing: 1960-06-21
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Granted: 1966-06-07
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Expires: 1980-06-21
Abstract
No abstract record available.
Inventors
- 👤 Jr Earl L Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:17
CPC Classifications
B; B29; B29C; B29C41/00; B29C41/02; B29C41/04; B29C70/00; B29C70/58; C; C06; C06B; C06B21/00; C06B21/0033; C06B21/0058; F; F02; F02K; F02K9/00; F02K9/08; F02K9/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A PROCESS FOR MOLDING AN ARTICLE OF VARYING COMPOSITION COMPRISED OF POLYMERIC SUBSTANCE CONTAINING FILLING MATERIALS COMPRISING PROVIDING A STREAM COMPRISED OF A FLUID CARRIEDR HAVING DISPERSED THEREIN COMPONENTS OF POLYMERIC SUBSTANCES AND FILLING MATERIALS, FEEDING SAID STREAM INTO A MOLD ROTATING ABOUT AN INTERNAL AXIS, ROTATING SAID MOLD DURING SAID FEEDING AT AN R.P.M. SUFFICIENT TO PROVIDE A CENTRIFUGAL SEPARATION OF SAID DISPERSED COMPONENTS FROM SAID CARRIER, AND PROGRESSIVELY BUILDING UP SAID ARTICLE FROM SAID COMPONENTS BY SUCCESSIVE CENTRIFUGAL DEPOSITION, VARYING THE PARTICLE SIZE OF SAID FILLING MATERIALS IN SAID STREAM DURING SAID FEEDING, THEREBY VARYING THE PARTICLE SIZE OF SAID FILLING SUBSTANCES IN SAID SUCCESSIVE DEPOSITION AND PROVIDING AN ARTICLE HAVING A COMPOSITION WHICH VARIES WITH DISTANCE OF SAID DEPOSITION FROM THE AXIS OF ROTATION IN SAID MOLD, AND WITHDRAWING SAID FLUID CARRIER FROM SAID MOLD.
Claim 2
Dependent Claim
138 words
A PROCESS FOR MOLDING AN ARTICLE OF VARYING COMPOSITION COMPRISED OF POLYMERIC SUBSTANCE CONTAINING FILLING MATERIALS COMPRISING PROVIDING A STREAM COMPRISED OF A FLUID CARRIEDR HAVING DISPERSED THEREIN COMPONENTS OF POLYMERIC SUBSTANCES AND FILLING MATERIALS, FEEDING SAID STREAM INTO A MOLD ROTATING ABOUT AN INTERNAL AXIS, ROTATING SAID MOLD DURING SAID FEEDING AT AN R.P.M. SUFFICIENT TO PROVIDE A CENTRIFUGAL SEPARATION OF SAID DISPERSED COMPONENTS FROM SAID CARRIER, AND PROGRESSIVELY BUILDING UP SAID ARTICLE FROM SAID COMPONENTS BY SUCCESSIVE CENTRIFUGAL DEPOSITION, VARYING THE PARTICLE SIZE OF SAID FILLING MATERIALS IN SAID STREAM DURING SAID FEEDING, THEREBY VARYING THE PARTICLE SIZE OF SAID FILLING SUBSTANCES IN SAID SUCCESSIVE DEPOSITION AND PROVIDING AN ARTICLE HAVING A COMPOSITION WHICH VARIES WITH DISTANCE OF SAID DEPOSITION FROM THE AXIS OF ROTATION IN SAID MOLD, AND WITHDRAWING SAID FLUID CARRIER FROM SAID MOLD.
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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) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |