US3247534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scrapless heading
Assignee: National Machinery Co
•
Filing: 1963-03-13
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Granted: 1966-04-26
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Expires: 1983-03-13
Abstract
No abstract record available.
Inventors
- 👤 Herbert L Mcclellan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:38
CPC Classifications
B; B21; B21K; B21K27/00; B21K27/02; B21K27/04; B21J; B21J13/00; B21J13/02; B21J13/03; B21J9/00; B21J9/02; B21J9/022; B21J9/06; B21K1/00; B21K1/44; B21K1/46; B21K27/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A METHOD OF FORMING A POLYGONAL HEAD WASHER FACE BOLT BLANK COMPRISING AXIALLY PRESSING A BLANK HAVING AN INTERMEDIATE POLYGONAL HEAD OF UNIFORM CROSSSECTION, UNFILLED CORNERS IN A POLYGONAL DIE HAVING A RADIALLY EXTENDING END FACE ADJACENT THE CORNERS OF SAID DIE AND A CIRCULAR END OPENING THEREBY SHEARING A CIRCULAR PORTION OF ONE END OF SAID BLANK AND RADIALLY FLOWING SAID BLANK ALONG SAID END FACE TO FORM A SHARPLY FILLED CORNERS AT SAID ONE END, AND THEREAFTER AXIALLY PRESSING SAID BLANK WITHIN A UNIFORM CROSS-SECTION POLYGONAL DIE
Claim 2
Independent Claim
89 words
A METHOD OF FORMING A POLYGONAL HEAD WASHER FACE BOLT BLANK COMPRISING AXIALLY PRESSING A BLANK HAVING AN INTERMEDIATE POLYGONAL HEAD OF UNIFORM CROSSSECTION, UNFILLED CORNERS IN A POLYGONAL DIE HAVING A RADIALLY EXTENDING END FACE ADJACENT THE CORNERS OF SAID DIE AND A CIRCULAR END OPENING THEREBY SHEARING A CIRCULAR PORTION OF ONE END OF SAID BLANK AND RADIALLY FLOWING SAID BLANK ALONG SAID END FACE TO FORM A SHARPLY FILLED CORNERS AT SAID ONE END, AND THEREAFTER AXIALLY PRESSING SAID BLANK WITHIN A UNIFORM CROSS-SECTION POLYGONAL DIE
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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |