US2790756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for electrolytic treatment of slide fasteners
Assignee: Individual
•
Filing: 1952-07-29
•
Granted: 1957-04-30
•
Expires: 1972-07-29
Abstract
No abstract record available.
Inventors
- 👤 Charles C Cohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:59
CPC Classifications
C; C25; C25D; C25D7/00; C25D7/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A METHOD FOR THE ELECTROLYTIC TREATMENT OF A SLIDE FASTENER OF THE ZIPPE TYPE HAVING METALLIC INTERENGAGING ELEMENTS COMPRISING SUBJECTING THE ELEMENTS OF THE CLOSED ZIPPER TO COMPRESSION TO DISTORT THE SHAPE OF INDIVIDUAL ELEMENTS TO REDUCE CLEARANCES BETWEEN ADJACENT INTERENGAGEING ELEMENTS THEREOF AND THEN PROGRESSING THE CLOSED ZIPPER THROUGH AN ELECTROLYTIC BATH WHILE CAUSING IT TO CONFORM TO A CURVATURE SUCH THAT ELECTICAL CONTINUITY IS ENFORCED BETWEEN THE NTERENGAGING ELEMENTS THEREOF AND WHILE AT LEAST SOME ELEMENTS THEREOF ARE IN CONDUCTIVE CONTACT WITH A MEMBER CARRYING CURRENT FOR THE TREATMENT.
Claim 2
Independent Claim
91 words
A METHOD FOR THE ELECTROLYTIC TREATMENT OF A SLIDE FASTENER OF THE ZIPPE TYPE HAVING METALLIC INTERENGAGING ELEMENTS COMPRISING SUBJECTING THE ELEMENTS OF THE CLOSED ZIPPER TO COMPRESSION TO DISTORT THE SHAPE OF INDIVIDUAL ELEMENTS TO REDUCE CLEARANCES BETWEEN ADJACENT INTERENGAGEING ELEMENTS THEREOF AND THEN PROGRESSING THE CLOSED ZIPPER THROUGH AN ELECTROLYTIC BATH WHILE CAUSING IT TO CONFORM TO A CURVATURE SUCH THAT ELECTICAL CONTINUITY IS ENFORCED BETWEEN THE NTERENGAGING ELEMENTS THEREOF AND WHILE AT LEAST SOME ELEMENTS THEREOF ARE IN CONDUCTIVE CONTACT WITH A MEMBER CARRYING CURRENT FOR THE TREATMENT.
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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) | 1960-04-29 | 1960-10-29 | 1961-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-29 | 1964-10-29 | 1965-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-29 | 1968-10-29 | 1969-04-30 | $7700.00 | Window Closed / Lapsed |