US3218704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for fabricating high strength wall structures
Assignee: North American Aviation Corp
•
Filing: 1961-12-12
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Granted: 1965-11-23
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Expires: 1981-12-12
Abstract
No abstract record available.
Inventors
- 👤 William P Kraus
- 👤 Charles W Guy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:37
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/06; B23K20/08; B21; B21D; B21D51/00; B21D51/16; B21D51/24; B21F; B21F17/00; B21F99/00; B22; B22F; B22F3/00; B22F3/02; B22F3/08; B23K20/085; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49805; Y10T29/49826; Y10T29/49881; Y10T428/00; Y10T428/12; Y10T428/12444
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A METHOD FOR EXPLOSIVELY FORMING AN IMPERFORATE HOLLOW METALLIC STRUCTURE ON A LONGITUDINAL AXIS COMPRISING THE STEPS OF FORMING A FIRST METALLIC SHELL MEMBER ON SAID AXIS, SPIRAL WRAPPING METALLIC WIRE ON SAID FIRST SHELL MEMBER AT A PREDETERMINED WRAPPING ANGLE RELATIVE TO SAID AXIS TO FORM AT LEAST ONE WIRE LAYER, FORMING A SECOND METALLIC SHELL MEMBER ON SAID WIRE LAYER, HOLDING SAID FIRST AND SECOND SHELL MEMBERS AND SAID WIRE LAYER IN FIXED POSITION RELATIVE TO EACH OTHER, DISCHARGING AN EX-
Claim 2
Independent Claim
83 words
A METHOD FOR EXPLOSIVELY FORMING AN IMPERFORATE HOLLOW METALLIC STRUCTURE ON A LONGITUDINAL AXIS COMPRISING THE STEPS OF FORMING A FIRST METALLIC SHELL MEMBER ON SAID AXIS, SPIRAL WRAPPING METALLIC WIRE ON SAID FIRST SHELL MEMBER AT A PREDETERMINED WRAPPING ANGLE RELATIVE TO SAID AXIS TO FORM AT LEAST ONE WIRE LAYER, FORMING A SECOND METALLIC SHELL MEMBER ON SAID WIRE LAYER, HOLDING SAID FIRST AND SECOND SHELL MEMBERS AND SAID WIRE LAYER IN FIXED POSITION RELATIVE TO EACH OTHER, DISCHARGING AN EX-
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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) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |