US3313621A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming porous seamless tubing
Assignee: Mott Corp
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Filing: 1965-06-15
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Granted: 1967-04-11
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Expires: 1985-06-15
Abstract
No abstract record available.
Inventors
- 👤 Rd Lambert H Mott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:46
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/10; B22F3/11; B22F3/1121; B22F2998/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
128 words
THE METHOD OF FORMING A POROUS SEAMLESS TUBE FROM SINTERABLE METAL PARTICLES, WHICH COMPRISES THE STEPS OF COATING THE PARTICLES OF METAL TO BE SINTERED WITH A THERMOSETTING RESIN, CHARGING THE ANNULAR CAVITY OF A MOLD DEFINED BETWEEN A TUBE OF REFRACTORY MATERIAL AND A CENTRAL RIGID CORE OF SUCH MOLD, WITH SUCH COATED PARTICLES, HEATING THE CHARGED MOLD TO A TEMPERATURE SUFFICIENT TO CURE THE RESIN BUT FAR BELOW THE SINTERING TEMPERATURE OF THE METAL PARTICLES, TO FORM A SEMIFINISHED RIGID TUBE IN SAID REFRACTORY TUBE, THEREUPON AFTER COOLING OF THE MOLD, REMOVING THE CORE AND HEATING THE REFRACTORY TUBE WITH THE SEMI-FINISHED TUBE THEREIN A HYDDROGEN ATMOSPHERE TO THESINTERING TEMPERATURE OF THE METAL PARTICLES TO BURN AWAY THE RESIN THEREBY LEAVING A RIGID POROUS METAL TUBE.
Claim 2
Independent Claim
128 words
THE METHOD OF FORMING A POROUS SEAMLESS TUBE FROM SINTERABLE METAL PARTICLES, WHICH COMPRISES THE STEPS OF COATING THE PARTICLES OF METAL TO BE SINTERED WITH A THERMOSETTING RESIN, CHARGING THE ANNULAR CAVITY OF A MOLD DEFINED BETWEEN A TUBE OF REFRACTORY MATERIAL AND A CENTRAL RIGID CORE OF SUCH MOLD, WITH SUCH COATED PARTICLES, HEATING THE CHARGED MOLD TO A TEMPERATURE SUFFICIENT TO CURE THE RESIN BUT FAR BELOW THE SINTERING TEMPERATURE OF THE METAL PARTICLES, TO FORM A SEMIFINISHED RIGID TUBE IN SAID REFRACTORY TUBE, THEREUPON AFTER COOLING OF THE MOLD, REMOVING THE CORE AND HEATING THE REFRACTORY TUBE WITH THE SEMI-FINISHED TUBE THEREIN A HYDDROGEN ATMOSPHERE TO THESINTERING TEMPERATURE OF THE METAL PARTICLES TO BURN AWAY THE RESIN THEREBY LEAVING A RIGID POROUS METAL TUBE.
Claim 3
Dependent Claim
37 words
THE METHOD SET FORTH IN CLAIM 1 IN WHICH THE SINTERED TUBE IS RESINTERED AT A TEMPERATURE APPROXIMATELY 100 TO 200 DEGREES HIGHER THAN THE TEMPERATURE OF THE FIRST SINTERING OPERATION WHICH IS BETWEEN 1500* TO 2100*F.
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) | 1970-04-10 | 1970-10-10 | 1971-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-10 | 1974-10-10 | 1975-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-10 | 1978-10-10 | 1979-04-11 | $7700.00 | Window Closed / Lapsed |