US2855337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and adjuvant powder for thermochemical material removal from refractory materials
Assignee: Individual
•
Filing: 1956-05-01
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Granted: 1958-10-07
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Expires: 1976-05-01
Abstract
No abstract record available.
Inventors
- 👤 Edward M Holub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:27
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/02; B23K35/0211; B23K7/00; B23K7/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
98 words
IN THE PROCESS OF THERMOCHIMICALLY REMOVING MATERIAL FROM A REFRACTORY BODY, WHEREIN A STREAM OF OXIDIZING GAS AND ADJUVANT POWDERED MATERIAL ARE CONCURRENTLY DIRECTED AGAINST A HEATED ZONE OF SUCH BODY, THE IMPROVEMENT WHICH COMPRISES CONTRIBUTING ABRASIVE ACTION TO SAID METAL REMOVAL BY EMPLOYING AS SAID ADJUVANT POWDERED MATERIAL A MIXTURE CONTAINING BETWEEN 10 PERCENT BY WEIGHT A MIXTURE CONTAINING BETWEEN 10 PERCENT BY QUARTZ AND HAVING PARTICLE SIZES SUBSTANTIALLY DISTRIBUTED BETWEEN ABOUT 30 MESH AND 100 MESH AND THE REMAINDER AT LEAST ONE OXIDIZABLE METAL POWDER SELECTED FROM THE GROUP CONSISTING OF IRON POWDER AND ALIMUNUM POWDER.
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) | 1961-10-06 | 1962-04-07 | 1962-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-06 | 1966-04-07 | 1966-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-06 | 1970-04-07 | 1970-10-07 | $7700.00 | Window Closed / Lapsed |