Patent US2933437A successfully refreshed from Google Patents.
US2933437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical lapping method
Assignee: AT&T Inc
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Filing: 1956-05-29
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Granted: 1960-04-19
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Expires: 1976-05-29
Abstract
No abstract record available.
Inventors
- 👤 Loosme Oskar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:52
CPC Classifications
B; B24; B24B; B24B1/00; C; C23; C23F; C23F1/00; G; G11; G11B; G11B5/00; G11B5/127; G11B5/17; G11B5/187; G11B5/1871; G11B5/23
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
170 words
A PROCESS FOR REMOVING A PROTRUDING PORTION OF A METAL REGION FROM A BODY HAVING A COMPOSITE SURFACE OF SUCH METAL AND ANOTHER MATERIAL, COMPRISING REPEATEDLY TREATING THE PROTRUDING SURFACE OF THE METAL WITH A CHEMICAL REAGENT SOLUTION, THE SOLUTION BEING SUCH THAT IT IS SUBSTANTIALLY INSERT WITH RESPECT TO THE SAID MATERIAL AND SUCH THAT IT REACTS WITH THE METAL TO FORM A LAYER OF A COMPOUND OF THE METAL WHICH IS SOFTER THAN BOTH THE SAID METAL AND THE SAID MATERIAL AND WHICH LAYER IS SUBSTANTIALLY INSOLUBLE IN THE SAID SOLUTION, AND RUBBING WITH A SMOOTH SUBSTANCE WHICH IS ABRASIVE WITH RESPECT TO THE LAYER BUT WHICH IS SUBSTANTIALLY UNABRASIVE WITH REPECT TO BOTH THE SAID METAL AND THE SAID MATERIAL, THE PROCESS BEING CONTINUED UNTIL SUCH PROTRUDING METAL PORTION HAS BEEN REMOVED TO PRODUCE A SMOOTH COMPOSITE SURFACE OF THE SAID MATERIAL AND THE SAID METAL, FURTHER ABRADING OF THE SAID LAYER BEING PREVENTED BY THE SUBSTANTIAL INABILITY OF THE SAID SUBSTANCE TO ABRADE THE SAID MATERIAL.
Claim 2
Dependent Claim
170 words
A PROCESS FOR REMOVING A PROTRUDING PORTION OF A METAL REGION FROM A BODY HAVING A COMPOSITE SURFACE OF SUCH METAL AND ANOTHER MATERIAL, COMPRISING REPEATEDLY TREATING THE PROTRUDING SURFACE OF THE METAL WITH A CHEMICAL REAGENT SOLUTION, THE SOLUTION BEING SUCH THAT IT IS SUBSTANTIALLY INSERT WITH RESPECT TO THE SAID MATERIAL AND SUCH THAT IT REACTS WITH THE METAL TO FORM A LAYER OF A COMPOUND OF THE METAL WHICH IS SOFTER THAN BOTH THE SAID METAL AND THE SAID MATERIAL AND WHICH LAYER IS SUBSTANTIALLY INSOLUBLE IN THE SAID SOLUTION, AND RUBBING WITH A SMOOTH SUBSTANCE WHICH IS ABRASIVE WITH RESPECT TO THE LAYER BUT WHICH IS SUBSTANTIALLY UNABRASIVE WITH REPECT TO BOTH THE SAID METAL AND THE SAID MATERIAL, THE PROCESS BEING CONTINUED UNTIL SUCH PROTRUDING METAL PORTION HAS BEEN REMOVED TO PRODUCE A SMOOTH COMPOSITE SURFACE OF THE SAID MATERIAL AND THE SAID METAL, FURTHER ABRADING OF THE SAID LAYER BEING PREVENTED BY THE SUBSTANTIAL INABILITY OF THE SAID SUBSTANCE TO ABRADE THE SAID MATERIAL.
References Cited (Backward Citations)
US1383174A
Cited
GB505183A
Cited
US2327870A
Cited
US2549946A
Cited
US2732288A
Cited
US2677019A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |