US3346477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hand instrument for electrolytic and acid etching
Assignee: W and W Products
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Filing: 1964-06-08
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Granted: 1967-10-10
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Expires: 1984-06-08
Abstract
No abstract record available.
Inventors
- 👤 Harnisch P Wolfer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:24
CPC Classifications
C; C25; C25F; C25F7/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
133 words
IN A HAND ETCHING INSTRUMENT: A CASING; AN ACID ELECTROLYTE CARTRIDGE HAVING A TUB MADE OF FLEXIBLE RESILIENT MATERIAL, SAID CARTRIDGE HAVING AN ELECTRODE SECURED AT ONE END OF THE TUBE AND AN APPLICATOR ATTACHED TO THE ELECTRODE, SAID ELECTRODE HAVING PASSAGE MEANS FOR CONDUCTING ELECTROLYTE TO THE APPLICATOR; A DETACHABLE TIP CARRIED BY THE CASING AND MOUNTING THE CARTRIDGE FOR ROTATION ABOUT ITS AXIS WITH THE APPLICATOR EXPOSED AT THE END OF THE CASING; A MOTOR IN THE CASING FOR ROTATING THE CARTRIDGE; BATTERY MEANS IN THE CASING FOR OPERATING THE MOTOR AND FOR POLARIZING THE ELECTRODE; MEANS MOUNTED ON THE CASING FOR TRANSFERRING DIGITAL PRESSURE TO THE CONTAINER; AND SWITCH MEANS FOR THE MOTOR AND BIASED TO OPEN POSITION, SAID SWITCH MEANS HAVING AN ACTUATOR LOCATED ADJACENT THE PRESSURE TRANSFERRING MEANS.
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) | 1970-10-09 | 1971-04-10 | 1971-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-09 | 1975-04-10 | 1975-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-09 | 1979-04-10 | 1979-10-10 | $7700.00 | Window Closed / Lapsed |