US2861932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating semi-conductor articles
Assignee: Rauland Borg Corp
•
Filing: 1957-03-06
•
Granted: 1958-11-25
•
Expires: 1977-03-06
Abstract
No abstract record available.
Inventors
- 👤 Robert G Pohl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:43
CPC Classifications
C; C25; C25F; C25F3/00; C25F3/02; C25F3/12; H; H10; H10P; H10P50/00; H10P50/60; H10P50/61; H10P50/613
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
THE METHOD OF PROCESSING A SEMI-CONDUCTOR ARTICLE IN A LIQUID ELECTROLYTIC CHEMICAL ETCHANT OF PREDETERMINED VOLUME SURROUND BY A LIQUID COOLING MEDIUM OF SUBSTANTIALLY LARGER VOLUME COMPRISING THE STEPS OF: MAINTAINING SAID LIQUID COOLING MEDIUM AT A SUBSTANTIALLY CONSTANT PREDETERMINED TEMPERATURE; IMMERSING SAID ARTICLE IN SAID LIQUID ELECTROLYTIC CHEMICAL ETCHANT; POLARIZING SAID IMMERSED ARTICLE ANODICALLY TO PASS AN ELECTRIC CURRENT FROM SAID ARTICLE THROUGH SAID ELECTROLYTIC CHEMICAL ETCHANT; AND DURING PASSAGE OF SAID ELECTRIC CURRENT IMPARTING TO SAID ETCHANT ULTRASONIC ENERGY AT A CAVITATION FREQUENCY.
Claim 2
Independent Claim
85 words
THE METHOD OF PROCESSING A SEMI-CONDUCTOR ARTICLE IN A LIQUID ELECTROLYTIC CHEMICAL ETCHANT OF PREDETERMINED VOLUME SURROUND BY A LIQUID COOLING MEDIUM OF SUBSTANTIALLY LARGER VOLUME COMPRISING THE STEPS OF: MAINTAINING SAID LIQUID COOLING MEDIUM AT A SUBSTANTIALLY CONSTANT PREDETERMINED TEMPERATURE; IMMERSING SAID ARTICLE IN SAID LIQUID ELECTROLYTIC CHEMICAL ETCHANT; POLARIZING SAID IMMERSED ARTICLE ANODICALLY TO PASS AN ELECTRIC CURRENT FROM SAID ARTICLE THROUGH SAID ELECTROLYTIC CHEMICAL ETCHANT; AND DURING PASSAGE OF SAID ELECTRIC CURRENT IMPARTING TO SAID ETCHANT ULTRASONIC ENERGY AT A CAVITATION FREQUENCY.
References Cited (Backward Citations)
US2656496A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-24 | 1962-05-26 | 1962-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-24 | 1966-05-26 | 1966-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-24 | 1970-05-26 | 1970-11-25 | $7700.00 | Window Closed / Lapsed |