US2628936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a point at the end of a wire
Assignee: AT&T Inc
•
Filing: 1949-05-06
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Granted: 1953-02-17
•
Expires: 1969-05-06
Abstract
No abstract record available.
Inventors
- 👤 Vincent J Albano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:07
CPC Classifications
C; C25; C25F; C25F3/00; C25F3/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
THE METHOD OF SHARPENING A METALLIC MEMBER BY ETCHING WHICH COMPRISES MOUNTING SAID MEMBER WITH A PORTION THEREOF EXTERNAL OF AN ETCHING BATH AND ANOTHER PORTION EXTENDING THROUGH THE SURFACE OF AND INTO THE BATH, FLOATING A LAYER OF LIQUID WHICH IS IMMISCIBLE WITH THE ETCHANT AND IS CHEMICALLY INERT TO THE ETCHANT ON THE SURFACE OF THE ETCHING BATH TO CONTROL THE SHAPE OF THE INTERFACE BETWEEN THE ETCHING BATH AND THE LIQUID WHERE THE MEMBER PENETRATES IT AND PARTIALLY DISSOLVING THAT PORTION OF THE MEMBER WHICH IS IMMERSED IN THE ETCHING BATH AND IS IMMEDIATELY BELOW SAID INTERFACE.
Claim 2
Independent Claim
100 words
THE METHOD OF SHARPENING A METALLIC MEMBER BY ETCHING WHICH COMPRISES MOUNTING SAID MEMBER WITH A PORTION THEREOF EXTERNAL OF AN ETCHING BATH AND ANOTHER PORTION EXTENDING THROUGH THE SURFACE OF AND INTO THE BATH, FLOATING A LAYER OF LIQUID WHICH IS IMMISCIBLE WITH THE ETCHANT AND IS CHEMICALLY INERT TO THE ETCHANT ON THE SURFACE OF THE ETCHING BATH TO CONTROL THE SHAPE OF THE INTERFACE BETWEEN THE ETCHING BATH AND THE LIQUID WHERE THE MEMBER PENETRATES IT AND PARTIALLY DISSOLVING THAT PORTION OF THE MEMBER WHICH IS IMMERSED IN THE ETCHING BATH AND IS IMMEDIATELY BELOW SAID INTERFACE.
References Cited (Backward Citations)
US2115005A
Cited
US2434286A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-17 | 1956-08-18 | 1957-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-17 | 1960-08-18 | 1961-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-17 | 1964-08-18 | 1965-02-17 | $7700.00 | Window Closed / Lapsed |