US2895814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for removing metal from the surface of a metal object
Assignee: TURKO PRODUCTS Inc
•
Filing: 1955-02-04
•
Granted: 1959-07-21
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Expires: 1975-02-04
Abstract
No abstract record available.
Inventors
- 👤 Francis E Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:17
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A PROCESS FOR THE REMOVAL OF METAL FROM A METAL WORK PIECE WHICH COMPRISES DIRECTING A STREAM OF LIQUID ETCHANT AGAINST SAID WORK PIECE, DIRECTING A STREAM OF CONFINING FLUID AGAINST SAID WORK PIECE ADJACENT SAID STREAM OF LIQUID ETCHANT, SAID FLUID PRODUCING AN ETCHANT STREAM OF PREDETERMINED GEOMETRIC CROSS-SECTIONAL CONFIGURATION AND CONFINING THE AREA OF IMPINGEMENT OF SAID ETCHANT LIQUID ON SAID WORK PIECE, FROMING SAID PREDETERMINED GEOMETRIC ETCH CONFIGURATION IN SAID WORK PIECE, AND WITHDRAWING SPENT ETCHANT LIQUID AND CONFINING FLUID FROM SAID WORK PIECE.
Claim 2
Dependent Claim
87 words
A PROCESS FOR THE REMOVAL OF METAL FROM A METAL WORK PIECE WHICH COMPRISES DIRECTING A STREAM OF LIQUID ETCHANT AGAINST SAID WORK PIECE, DIRECTING A STREAM OF CONFINING FLUID AGAINST SAID WORK PIECE ADJACENT SAID STREAM OF LIQUID ETCHANT, SAID FLUID PRODUCING AN ETCHANT STREAM OF PREDETERMINED GEOMETRIC CROSS-SECTIONAL CONFIGURATION AND CONFINING THE AREA OF IMPINGEMENT OF SAID ETCHANT LIQUID ON SAID WORK PIECE, FROMING SAID PREDETERMINED GEOMETRIC ETCH CONFIGURATION IN SAID WORK PIECE, AND WITHDRAWING SPENT ETCHANT LIQUID AND CONFINING FLUID FROM SAID WORK PIECE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-20 | 1963-01-19 | 1963-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-20 | 1967-01-19 | 1967-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-20 | 1971-01-19 | 1971-07-21 | $7700.00 | Window Closed / Lapsed |