US3352769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing microperforated stainless steel sheets
Assignee: Individual
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Filing: 1967-01-11
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Granted: 1967-11-14
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Expires: 1987-01-11
Abstract
No abstract record available.
Inventors
- 👤 Ruben Samuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:08
CPC Classifications
C; C25; C25F; C25F3/00; C25F3/02; C25F3/14; A; A47; A47G; A47G19/00; A47G19/02; B; B01; B01D; B01D39/00; B01D39/10; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10T; Y10T428/00; Y10T428/12; Y10T428/12361; Y10T428/12431; Y10T428/12479
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
101 words
AN ELECTRICALLY CONTROLLED PROCESS FOR PRODUCING MICROPERFORATED STAINLESS STEEL WHICH COMPRISES CONNECTING A SHEET OF STAINLESS STEEL HAVING A THICKNESS BETWEEN APPROXIMATELY .0005" AND .005", CONTAINING INTERGRANULAR IRON CHROMIUM PRECIPITATES AND CONTAINING AS ESSENTIAL ELEMENTS A PREPONDERANCE OF IRON AND A LESSER BUT SIGNIFICANT AMOUNT OF CHROMIUM AS THE ANODE IN AN ELECTROLYTIC CELL HAVING A NON-POLARIZING ELECTROLYTE AND A CATHODE AND DISCHARGING DIRECT CURRENT THROUGH SAID CELL SO AS TO ANODICALLY DISSOLVE INTERGRANULAR IRON CHROMIUM PRECIPITATES IN SAID SHEET AND TO THEREBY PRODUCE A MULTIPLICITY OF LIGHT TRANSMITTING MICROPERFORATIONS THROUGH SAID SHEET, THE MICROPERFORATIONS BEING PRIMARILY DUE TO ELECTROCHEMICAL ACTION.
Claim 2
Dependent Claim
101 words
AN ELECTRICALLY CONTROLLED PROCESS FOR PRODUCING MICROPERFORATED STAINLESS STEEL WHICH COMPRISES CONNECTING A SHEET OF STAINLESS STEEL HAVING A THICKNESS BETWEEN APPROXIMATELY .0005" AND .005", CONTAINING INTERGRANULAR IRON CHROMIUM PRECIPITATES AND CONTAINING AS ESSENTIAL ELEMENTS A PREPONDERANCE OF IRON AND A LESSER BUT SIGNIFICANT AMOUNT OF CHROMIUM AS THE ANODE IN AN ELECTROLYTIC CELL HAVING A NON-POLARIZING ELECTROLYTE AND A CATHODE AND DISCHARGING DIRECT CURRENT THROUGH SAID CELL SO AS TO ANODICALLY DISSOLVE INTERGRANULAR IRON CHROMIUM PRECIPITATES IN SAID SHEET AND TO THEREBY PRODUCE A MULTIPLICITY OF LIGHT TRANSMITTING MICROPERFORATIONS THROUGH SAID SHEET, THE MICROPERFORATIONS BEING PRIMARILY DUE TO ELECTROCHEMICAL ACTION.
Claim 3
Dependent Claim
12 words
A MICROPERFORATED STAINLESS STEEL PRODUCT PRODUCED BY THE PROCESS OF CLAIM 1.
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) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |