US3279043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permeable sheet metal and method of making same
Assignee: Garrett Corp
•
Filing: 1964-06-15
•
Granted: 1966-10-18
•
Expires: 1984-06-15
Abstract
No abstract record available.
Inventors
- 👤 Leslie S Wirt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:53
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B1/84; E04B1/86; B; B21; B21D; B21D31/00; B21D31/02; B21D47/00; E04C; E04C2/00; E04C2/30; E04C2/32; E04C2/326; E04B2001/8414; E04B2001/8457; E04B2001/8476; E04B2001/848; E04B2001/849; E04B2001/8495; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/496; Y10T29/4981; Y10T29/49812; Y10T428/00; Y10T428/12; Y10T428/12361; Y10T428/12479; Y10T428/24; Y10T428/24174
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A METHOD OF PRODUCING A POROUS METAL SHEET HAVING A PREDETERMINED PERMEABILITY PER UNIT OF AREA OF SAID SHEET, WHICH METHOD COMPRISES: (A) PERFORATING SAID SHEET BY SMOOTHLY SHEARING AND BENDING PREDETERMINED PORTIONS OF THE METAL IN A MULTIPLICITY OF LOCATIONS IN UNIFORM AND CLOSELY SPACED RELATION TO ONE ANOTHER THEREBY FORMING EXPOSED EDGES IN THE SHEET AND SUCH BENT PORTIONS; (B) REMOVING UNIFORM AMOUNTS OF METAL SUBSTANTIALLY EQUAL TO ONE-HALF THE WIDTH OF THE DESIRED PORE SIZE FROM EACH OF SAID EXPOSED EDGES; AND (C) RETURNING SAID BENT PORTIONS TO THEIR ORIGINAL POSITIONS IN SAID SHEET.
Claim 2
Independent Claim
97 words
A METHOD OF PRODUCING A POROUS METAL SHEET HAVING A PREDETERMINED PERMEABILITY PER UNIT OF AREA OF SAID SHEET, WHICH METHOD COMPRISES: (A) PERFORATING SAID SHEET BY SMOOTHLY SHEARING AND BENDING PREDETERMINED PORTIONS OF THE METAL IN A MULTIPLICITY OF LOCATIONS IN UNIFORM AND CLOSELY SPACED RELATION TO ONE ANOTHER THEREBY FORMING EXPOSED EDGES IN THE SHEET AND SUCH BENT PORTIONS; (B) REMOVING UNIFORM AMOUNTS OF METAL SUBSTANTIALLY EQUAL TO ONE-HALF THE WIDTH OF THE DESIRED PORE SIZE FROM EACH OF SAID EXPOSED EDGES; AND (C) RETURNING SAID BENT PORTIONS TO THEIR ORIGINAL POSITIONS IN SAID SHEET.
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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) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |