Patent US2664254A successfully refreshed from Google Patents.
Patent US3308645A successfully refreshed from Google Patents.
US3308645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Die for producing self-locking threaded fastener
Assignee: COLUMBUS BOLT AND FORGING CO
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Filing: 1963-11-19
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Granted: 1967-03-14
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Expires: 1983-11-19
Abstract
No abstract record available.
Inventors
- 👤 Lynn F Hampton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:52
CPC Classifications
B; B21; B21H; B21H3/00; B21H3/02; B21H3/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
AN IMPROVED THREAD ROLLING DIE MEANS COMPRISING, IN COMBINATION, FIRST AND SECOND RELATIVELY MOVABLE DIE PORTIONS; A PLURALITY OF LONGITUDINALLY EXTENDING CRESTS ON THE FACE OF ONE OF SAID DIE PORTIONS, THE LONGITUDINAL AXES OF SAID CREST BEING INCLINED RELATIVE TO THE LONGITUDINAL AXIS OF ONE OF SAID DIE PORTIONS, SAID FACE OF SAID DIE POR-
Claim 2
Dependent Claim
56 words
AN IMPROVED THREAD ROLLING DIE MEANS COMPRISING, IN COMBINATION, FIRST AND SECOND RELATIVELY MOVABLE DIE PORTIONS; A PLURALITY OF LONGITUDINALLY EXTENDING CRESTS ON THE FACE OF ONE OF SAID DIE PORTIONS, THE LONGITUDINAL AXES OF SAID CREST BEING INCLINED RELATIVE TO THE LONGITUDINAL AXIS OF ONE OF SAID DIE PORTIONS, SAID FACE OF SAID DIE POR-
References Cited (Backward Citations)
US1973201A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |