US2663928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for machining porous metals
Assignee: Individual
•
Filing: 1950-07-13
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Granted: 1953-12-29
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Expires: 1970-07-13
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry Lindsay Wheeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:13
CPC Classifications
B; B23; B23P; B23P25/00; B22; B22F; B22F3/00; B22F3/24; B22F3/26; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49703; Y10T29/4981; Y10T29/49812; Y10T29/49995
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A METHOD OF MACHINING A POROUD METAL FOR USE IN SWEAT-COOLING APPARATUS WHICH COMPRISES FILLING THE PORES OF THE SAID METAL WITH FLUID OXALIC ACID AT A TEMPERATURE BETWEEN 200-260 DEGREES FAHRENHEIT, COOLING THE SAID METAL WHEREBY THE SAID OXALIC ACID SOLIDIFES, MACHINING THE SAID METAL, AND REMOVING THE SAID OXALIC ACID BY HEATING.
Claim 2
Independent Claim
54 words
A METHOD OF MACHINING A POROUD METAL FOR USE IN SWEAT-COOLING APPARATUS WHICH COMPRISES FILLING THE PORES OF THE SAID METAL WITH FLUID OXALIC ACID AT A TEMPERATURE BETWEEN 200-260 DEGREES FAHRENHEIT, COOLING THE SAID METAL WHEREBY THE SAID OXALIC ACID SOLIDIFES, MACHINING THE SAID METAL, AND REMOVING THE SAID OXALIC ACID BY HEATING.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-28 | 1957-06-29 | 1957-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-28 | 1961-06-29 | 1961-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-28 | 1965-06-29 | 1965-12-29 | $7700.00 | Window Closed / Lapsed |