Patent US3820202A successfully refreshed from Google Patents.
US3820202A
Expired / Lapsed
US
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Slider operated zip fasteners
Assignee: YKK Corp
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Filing: 1972-06-15
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Granted: 1974-06-28
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Expires: 1992-06-15
Abstract
Abstract IMPROVEMENTS ARE PROVIDED IN SLIDER-OPERATED ZIP FASTENERS FOR PREVENTING THE FASTENER ELEMENTS FROM MOVING OUT OF THEIR PROPER POSITION ON STRINGER TAPES. ALTERNATE RIDGES AND GROOVES ARE FORMED IN THE ELEMENTS, WHICH RIDGES AND GROOVES ARE INTERENGAGEABLE WITH CORRESPONDING GROOVES AND RIDGES FORMED IN THE EDGES OF THE STRINGER TAPES ALONG WHICH THE ELEMENTS ARE MOUNTED, THEREBY ELIMINATING THE TENDENCY OF THE ELEMENTS BECOMING LATERALLY DISPLACED.
Inventors
- 👤 I Takamatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:13
CPC Classifications
A; A44; A44B; A44B19/00; A44B19/10; A44B19/12; A44B19/24; A44B19/34; A44B19/343; A44B19/40; A44B19/406; B; B65; B65D; B65D21/00; B65D71/00; B65D71/02; Y; Y10; Y10T; Y10T24/00; Y10T24/25; Y10T24/2518; Y10T24/2521; Y10T24/2525
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |