US2956470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piercing and tapping screw
Assignee: Illinois Tool Works Inc
•
Filing: 1958-03-25
•
Granted: 1960-10-18
•
Expires: 1978-03-25
Abstract
No abstract record available.
Inventors
- 👤 Knohl Friedrich Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:55
CPC Classifications
F; F16; F16B; F16B39/00; F16B39/22; F16B39/28; F16B39/282; F16B25/00; F16B25/001; F16B25/0021; F16B25/0036; F16B25/0084; F16B25/10; F16B25/103; F16B35/00; F16B35/04; F16B35/041; F16B35/044; F16B35/06; F16B39/24; F16B39/26; F16B2200/00; F16B2200/93; F16B31/00; F16B31/02; Y; Y10; Y10S; Y10S411/00; Y10S411/955; Y10S411/956; Y10S411/957; Y10S411/959
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US48133A
Cited
US88539A
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US373074A
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US1066253A
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US2403359A
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US2572647A
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US2740315A
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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) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |