Patent US3183757A successfully refreshed from Google Patents.
US3183757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Card punching dies
Assignee: Individual
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Filing: 1962-03-12
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Granted: 1965-05-18
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Expires: 1982-03-12
Abstract
No abstract record available.
Inventors
- 👤 Sorensen Villy Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:41
CPC Classifications
B; B26; B26F; B26F1/00; B26F1/02; B26F1/14; B21; B21D; B21D28/00; B21D28/24; B21D28/34; Y; Y10; Y10T; Y10T83/00; Y10T83/929; Y10T83/9411; Y10T83/9423; Y10T83/9437; Y10T83/944
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A PUNCHING DIE ELEMENT FOR USE IN THE PUNCHING OF RECTANGULAR HOLES IN PUNCHED CARDS, COMPRISING A PLURALITY OF FIRST STEEL BARS OF RECTANGULAR CROSS SECTION EACH FORMING IN ITSELF A COMPLETE AND INDEPENDENT ELEMENT, SAID FIRST STEEL BARS BEING PLACED SIDE BY SIDE AT A MUTUAL SPACING TO FORM A GRID, A PLURALITY OF GROOVES EXTENDING SIDE BY SIDE TRANSVERSELY OF SAID STEEL BARS ACROSS AT LEAST ONE FACE OF SAID GRID, A SECOND SURFACE GROUND STEEL BAR FORMING IN ITSELF A COMPLETE AND INDEPENDENT ELEMENT AND HAVING A HEIGHT EQUAL TO THE DEPTH OF SAID GROOVES BEING PRESS FITTED IN EACH OF SAID GROOVES, THE OUTER FACES OF SAID SECOND BARS AND THE ADJOINING FACES OF SAID FIRST BAR BEING SURFACE GROUND IN A COMMON GRINDING OPERATION TO FORM A SMOOTH GRID FACE.
Claim 2
Dependent Claim
135 words
A PUNCHING DIE ELEMENT FOR USE IN THE PUNCHING OF RECTANGULAR HOLES IN PUNCHED CARDS, COMPRISING A PLURALITY OF FIRST STEEL BARS OF RECTANGULAR CROSS SECTION EACH FORMING IN ITSELF A COMPLETE AND INDEPENDENT ELEMENT, SAID FIRST STEEL BARS BEING PLACED SIDE BY SIDE AT A MUTUAL SPACING TO FORM A GRID, A PLURALITY OF GROOVES EXTENDING SIDE BY SIDE TRANSVERSELY OF SAID STEEL BARS ACROSS AT LEAST ONE FACE OF SAID GRID, A SECOND SURFACE GROUND STEEL BAR FORMING IN ITSELF A COMPLETE AND INDEPENDENT ELEMENT AND HAVING A HEIGHT EQUAL TO THE DEPTH OF SAID GROOVES BEING PRESS FITTED IN EACH OF SAID GROOVES, THE OUTER FACES OF SAID SECOND BARS AND THE ADJOINING FACES OF SAID FIRST BAR BEING SURFACE GROUND IN A COMMON GRINDING OPERATION TO FORM A SMOOTH GRID FACE.
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) | 1968-05-17 | 1968-11-16 | 1969-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-17 | 1972-11-16 | 1973-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-17 | 1976-11-16 | 1977-05-18 | $7700.00 | Window Closed / Lapsed |