US3137922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a rigid structural member
Assignee: Individual
•
Filing: 1960-02-01
•
Granted: 1964-06-23
•
Expires: 1980-02-01
Abstract
No abstract record available.
Inventors
- 👤 Leon B Schumacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:40
CPC Classifications
E; E04; E04D; E04D3/00; E04D3/24; E04D3/30; B; B21; B21D; B21D5/00; B21D5/06; B21D5/08; Y; Y10; Y10S; Y10S72/00; Y10S72/701; Y10T; Y10T29/00; Y10T29/49; Y10T29/49616; Y10T29/49623; Y10T29/49629
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
THE METHOD OF FORMING DEEP EMBOSSED TRANSVERSELY EXTENDING CORRUGATIONS IN A STRIP OF SHEET METAL WITH THE DEPTH OF EACH CORRUGATION VARYING TRANSVERSELY OF THE STRIP, COMPRISING THE STEPS OF VARIABLY COLD REDUCING THE THICKNESS OF THE METAL IN THE REGIONS TO BE EMBOSSED TO PROVIDE AN ELONGATION SUBSTANTIALLY GREATER THAN THE MAXIMUM DETERMINED BY THE PHYSICAL PROPERTIES OF THE METAL IN PROPORTION TO THE RELATIVE DEPTH OF THE CORRUGATION IN THESE REGIONS WHEREBY TO PROVIDE A PROPORTIONATE INCREASE IN SURFACE AREA IN SUCH REGIONS, AND PRESSING THE METAL BETWEEN MATING PROJECTING AND RECESSED DIES IN THE SHAPE OF THE DESIRED CORRUGATIONS.
Claim 2
Independent Claim
102 words
THE METHOD OF FORMING DEEP EMBOSSED TRANSVERSELY EXTENDING CORRUGATIONS IN A STRIP OF SHEET METAL WITH THE DEPTH OF EACH CORRUGATION VARYING TRANSVERSELY OF THE STRIP, COMPRISING THE STEPS OF VARIABLY COLD REDUCING THE THICKNESS OF THE METAL IN THE REGIONS TO BE EMBOSSED TO PROVIDE AN ELONGATION SUBSTANTIALLY GREATER THAN THE MAXIMUM DETERMINED BY THE PHYSICAL PROPERTIES OF THE METAL IN PROPORTION TO THE RELATIVE DEPTH OF THE CORRUGATION IN THESE REGIONS WHEREBY TO PROVIDE A PROPORTIONATE INCREASE IN SURFACE AREA IN SUCH REGIONS, AND PRESSING THE METAL BETWEEN MATING PROJECTING AND RECESSED DIES IN THE SHAPE OF THE DESIRED CORRUGATIONS.
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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) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |