US3172931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making conduit utilizing helically preformed elements
Assignee: —
•
Filing: —
•
Granted: 1965-03-09
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Expires: 1982-03-09
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:59
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/17; H01B7/28; H01B7/282; B; B29; B29C; B29C48/00; B29C48/03; B29C48/05; B29C48/06; B29C48/15; B29C48/156
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
THE METHOD OF MAKING A REINFORCED TUBULAR STRUCTURE WHICH COMPRISES PREFORMING EACH OF A PLURALITY OF ELONGATED FORM-CONTAINING METALLIC ELEMENTS INTO A HELIX HAVING A PITCH GREATER THAN THE DIAMETER OF THE HELIX, ARRANGING SAID ELEMENTS IN CIRCUMFERENTIALLY EQUIDISTANTLY SPACED COAXIAL RELATION BY PASSING THEM THROUGH A ROTATABLE MEMBER COOPERATING WITH THE ELEMENTS TO FORM OF THEM A SKELETONIZED OPEN TUBULAR ASSEMBLY, ADVANCING
Claim 2
Independent Claim
63 words
THE METHOD OF MAKING A REINFORCED TUBULAR STRUCTURE WHICH COMPRISES PREFORMING EACH OF A PLURALITY OF ELONGATED FORM-CONTAINING METALLIC ELEMENTS INTO A HELIX HAVING A PITCH GREATER THAN THE DIAMETER OF THE HELIX, ARRANGING SAID ELEMENTS IN CIRCUMFERENTIALLY EQUIDISTANTLY SPACED COAXIAL RELATION BY PASSING THEM THROUGH A ROTATABLE MEMBER COOPERATING WITH THE ELEMENTS TO FORM OF THEM A SKELETONIZED OPEN TUBULAR ASSEMBLY, ADVANCING
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) | 1968-03-08 | 1968-09-07 | 1969-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-08 | 1972-09-07 | 1973-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-08 | 1976-09-07 | 1977-03-09 | $7700.00 | Window Closed / Lapsed |