Patent US3129504A successfully refreshed from Google Patents.
US3129504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal fabrication
Assignee: Dow Chemical Co
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Filing: 1960-10-24
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Granted: 1964-04-21
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Expires: 1980-10-24
Abstract
No abstract record available.
Inventors
- 👤 Joseph S Ivan
- 👤 Lawrence A Gould
- 👤 Robert C Austin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:57
CPC Classifications
B; B21; B21C; B21C25/00; B23; B23K; B23K9/00; B23K9/04; B23K9/044; B23K9/046; B23K9/048; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/505; B29C48/507; B30; B30B; B30B11/00; B30B11/22; B30B11/24; B30B11/246; B29C48/03; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/4998; Y10T29/49988; Y10T29/49989
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A METHOD OF PREPARING A SCREW HAVING AT LEAST ONE HELICALLY DISPOSED HARD SURFACED LAND COMPRISING (A) IN A CYLINDRICAL METAL BAR HAVING A DIAMETER ABOUT AS LARGE AS THE DESIRED SCREW, FORMING A HELICAL GROOVE IN THE CYLINDRICAL SURFACE OF SAID BAR, SAID GROOVE CORRESPONDING GENERALLY IN SIZE AND LOCATION TO THE DESIRED LAND; (B) DEPOSITING IN SAID GROOVE BY A WELDING METHOD A HARD
Claim 2
Independent Claim
66 words
A METHOD OF PREPARING A SCREW HAVING AT LEAST ONE HELICALLY DISPOSED HARD SURFACED LAND COMPRISING (A) IN A CYLINDRICAL METAL BAR HAVING A DIAMETER ABOUT AS LARGE AS THE DESIRED SCREW, FORMING A HELICAL GROOVE IN THE CYLINDRICAL SURFACE OF SAID BAR, SAID GROOVE CORRESPONDING GENERALLY IN SIZE AND LOCATION TO THE DESIRED LAND; (B) DEPOSITING IN SAID GROOVE BY A WELDING METHOD A HARD
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) | 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 |