Patent US3276919A successfully refreshed from Google Patents.
US3276919A
Expired / Lapsed
US
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Process for forming metal structures having very fine pores
Assignee: Electro Optical Systems Inc
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Filing: 1963-10-28
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Granted: 1966-10-04
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Expires: 1983-10-28
Abstract
No abstract record available.
Inventors
- 👤 Hoyt H Todd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:05
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/10; B22F3/11; B22F3/1143; Y; Y10; Y10S; Y10S148/00; Y10S148/901; Y10T; Y10T428/00; Y10T428/12; Y10T428/12479
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A PROCESS FOR FORMING A METAL STRUCTURE HAVING VERY FINE PORES FROM ONE HAVING COARSER PORES, SAID PROCESS COMPRISING THE STEPS OF: INITIALLY HEATING THE STURTRURE IN AN OXIDIZING ATMOSPHERE FOR A PREDETERMINED INTERVAL OF TIME AT A TEMPERATURE IN THE RANGE OF TEMPERATURES FROM 750* FAHRENHEIT TO 850* FAHRENHEIT; AND ADDITIONALLY HEATING THE STRUCTURE IN A DEOXIDIZING ATMOSPHERE FOR A PREDETERMINED INTERVAL OF TIME AT A TEMPERATURE IN THE RANGE OF TEMPERATURES FROM 1500* FAHRENHEIT TO 1800* FAHRENHEIT, SAID ADDITIONAL HEATING CONTINUING UNTIL THE STRUCTURE IS COMPLETELY DEOXIDIZED
Claim 2
Dependent Claim
89 words
A PROCESS FOR FORMING A METAL STRUCTURE HAVING VERY FINE PORES FROM ONE HAVING COARSER PORES, SAID PROCESS COMPRISING THE STEPS OF: INITIALLY HEATING THE STURTRURE IN AN OXIDIZING ATMOSPHERE FOR A PREDETERMINED INTERVAL OF TIME AT A TEMPERATURE IN THE RANGE OF TEMPERATURES FROM 750* FAHRENHEIT TO 850* FAHRENHEIT; AND ADDITIONALLY HEATING THE STRUCTURE IN A DEOXIDIZING ATMOSPHERE FOR A PREDETERMINED INTERVAL OF TIME AT A TEMPERATURE IN THE RANGE OF TEMPERATURES FROM 1500* FAHRENHEIT TO 1800* FAHRENHEIT, SAID ADDITIONAL HEATING CONTINUING UNTIL THE STRUCTURE IS COMPLETELY DEOXIDIZED
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) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |