Patent US3071022A successfully refreshed from Google Patents.
US3071022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Driving screws and method of fabricating the same
Assignee: Individual
•
Filing: 1960-02-26
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Granted: 1963-01-01
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Expires: 1980-02-26
Abstract
No abstract record available.
Inventors
- 👤 Strandgren Carl Bruno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:38
CPC Classifications
F; F16; F16H; F16H25/00; F16H25/18; F16H25/20; F16H25/24; F16H25/2427; B; B21; B21F; B21F17/00; B23; B23G; B23G7/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49865; Y10T29/49874; Y10T29/49881; Y10T74/00; Y10T74/19; Y10T74/19949; Y10T74/19953
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
52 words
A METHOD OF FABRICATING A DRIVING SCREW, COMPRISING THE STEPS OF FORMING AT LEAST ONE HELICAL GROOVE IN A CYLINDRICAL BODY, TREATING A WIRE TO DEVELOP RESIDUAL COMPRESSION STRESSES IN PART OF THE CROSS-SETION THEREOF, AND SECURING SUCH WIRE IN SAID BODY GROOVE WITH SUCH PART OF THE WIRE CROSS SECTION OUTERMOST.
Claim 2
Independent Claim
52 words
A METHOD OF FABRICATING A DRIVING SCREW, COMPRISING THE STEPS OF FORMING AT LEAST ONE HELICAL GROOVE IN A CYLINDRICAL BODY, TREATING A WIRE TO DEVELOP RESIDUAL COMPRESSION STRESSES IN PART OF THE CROSS-SETION THEREOF, AND SECURING SUCH WIRE IN SAID BODY GROOVE WITH SUCH PART OF THE WIRE CROSS SECTION OUTERMOST.
Claim 3
Dependent Claim
19 words
THE METHOD, AS SET FORTH IN CLAIM 1, INCLUDING THE STEPS OF ROLLING THE WIRE TO CAUSE DIFFERENTIAL ELONGATION
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) | 1965-12-31 | 1966-07-02 | 1967-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-31 | 1970-07-02 | 1971-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-31 | 1974-07-02 | 1975-01-01 | $7700.00 | Window Closed / Lapsed |