Patent US3710429A successfully refreshed from Google Patents.
US3710429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sliding clasp fasteners
Assignee: Individual
•
Filing: 1971-08-27
•
Granted: 1973-01-16
•
Expires: 1991-08-27
Abstract
Abstract A process of making zip fastener elements is disclosed comprising the steps of bending two filaments of thermoplastic materials into S-shaped configurations, positioning these Sshaped configurations above each other, joining these S-shaped configurations together by welding along their central longitudinal axis, forming engaging heads in the welding process, separating the welded together S-shaped zigzag configurations along their central longitudinal axis and joining those fastener elements to supporting tapes either prior to or after separating by means of welding or sewing.
Inventors
- 👤 S Spindler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:13
CPC Classifications
B; B29; B29D; B29D5/00; B29D5/04; Y; Y10; Y10T; Y10T24/00; Y10T24/25; Y10T24/2518; Y10T24/2527; Y10T29/00; Y10T29/49; Y10T29/49782; Y10T29/49785
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
In a process of making zip fastener elements the steps of benDing two filaments of thermoplastic materials into S-shaped configurations, positioning these S-shaped configurations above each other, joining these S-shaped configurations together by welding along their central longitudinal axis, forming engaging heads in the welding process, separating the welded together Sshaped zigzag configurations along their central longitudinal axis and joining those fastener elements to supporting tapes either prior to or after separating by means of welding or sewing.
Claim 2
Dependent Claim
78 words
In a process of making zip fastener elements the steps of benDing two filaments of thermoplastic materials into S-shaped configurations, positioning these S-shaped configurations above each other, joining these S-shaped configurations together by welding along their central longitudinal axis, forming engaging heads in the welding process, separating the welded together Sshaped zigzag configurations along their central longitudinal axis and joining those fastener elements to supporting tapes either prior to or after separating by means of welding or sewing.
References Cited (Backward Citations)
US3229362A
Cited
US3290747A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |