Patent US3426412A successfully refreshed from Google Patents.
US3426412A
Expired / Lapsed
US
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Fastening flexible sheet material
Assignee: Hilti AG
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Filing: 1966-09-20
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Granted: 1969-02-11
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Expires: 1986-09-20
Abstract
No abstract record available.
Inventors
- 👤 Alfred Josef Streng
- 👤 Kurt Zurcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:11
CPC Classifications
E; E05; E05D; E05D5/00; E05D5/10; E05D5/14; B; B44; B44C; B44C7/00; B44C7/02; B44C7/022; E21; E21D; E21D11/00; E21D11/38; E21D11/383; F; F16; F16B; F16B5/00; F16B5/06; F16B5/0692; Y; Y10; Y10T; Y10T24/00; Y10T24/44; Y10T24/44034; Y10T24/44043; Y10T24/44051; Y10T24/4406
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) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |