US3129493A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods for the manufacture of lightweight structural members
Assignee: Charles Davis Ltd
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Filing: 1961-06-20
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Granted: 1964-04-21
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Expires: 1981-06-20
Abstract
No abstract record available.
Inventors
- 👤 Grubb Lewis William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:35
CPC Classifications
B; B21; B21D; B21D47/00; B21D47/04; E; E04; E04C; E04C3/00; E04C3/02; E04C3/04; E04C3/08; E04C3/09; E04C2003/0486; E04C2003/0491; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49616; Y10T29/49623; Y10T29/49625
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A METHOD OF PRODUCING STRUCTURAL MEMBERS OF THE KIND SPECIFIED COMPRISING THE STEPS OF CRIMPING A LENGTH OF TUBING AT SPACED INTERVALS, FLATTENING THE TUBE AT CONVERGING ANGLES ON EACH SIDE OF THE CRIMPS, BENDING THE TUBE IN ALTERNATE DIRECTIONS ON SAID CRIMPS TO FORM A ZIGZAG LATTICE, INSERTING THE BEND AND FLATTENED PORTIONS ON EACH SIDE OF THE LATTICE, BETWEEN THE SIDES OR PREVIOUSLY FORMED CHORD MEMBERS, AND FINALLY ATTACHING THE SIDES OF THE CHORD MEMBERS TO THE FLATTENED PORTIONED OF THE LATTICE TO COMPLETE THE ASSEMBLY OF THE STRUCTURE.
Claim 2
Independent Claim
91 words
A METHOD OF PRODUCING STRUCTURAL MEMBERS OF THE KIND SPECIFIED COMPRISING THE STEPS OF CRIMPING A LENGTH OF TUBING AT SPACED INTERVALS, FLATTENING THE TUBE AT CONVERGING ANGLES ON EACH SIDE OF THE CRIMPS, BENDING THE TUBE IN ALTERNATE DIRECTIONS ON SAID CRIMPS TO FORM A ZIGZAG LATTICE, INSERTING THE BEND AND FLATTENED PORTIONS ON EACH SIDE OF THE LATTICE, BETWEEN THE SIDES OR PREVIOUSLY FORMED CHORD MEMBERS, AND FINALLY ATTACHING THE SIDES OF THE CHORD MEMBERS TO THE FLATTENED PORTIONED OF THE LATTICE TO COMPLETE THE ASSEMBLY OF THE STRUCTURE.
References Cited (Backward Citations)
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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) | 1967-04-21 | 1967-10-21 | 1968-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-21 | 1971-10-21 | 1972-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-21 | 1975-10-21 | 1976-04-21 | $7700.00 | Window Closed / Lapsed |