US2901938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self threading fastening bearing a helix the leading end of which is rounded to initiate thread rolling
Assignee: United Carr Fastener Corp
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Filing: 1957-01-31
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Granted: 1959-09-01
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Expires: 1977-01-31
Abstract
No abstract record available.
Inventors
- 👤 Jr Harold S Van Buren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:29
CPC Classifications
F; F16; F16B; F16B37/00; F16B37/02; B; B21; B21D; B21D53/00; B21D53/26; B21D53/28; F16B5/00; F16B5/02; Y; Y10; Y10S; Y10S411/00; Y10S411/03
Claims Analysis
Total Claims: 0
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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) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |