Patent US3317072A successfully refreshed from Google Patents.
US3317072A
Expired / Lapsed
US
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Cast box
Assignee: Killark Electric Manufacturing Co
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Filing: 1963-08-28
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Granted: 1967-05-02
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Expires: 1983-08-28
Abstract
No abstract record available.
Inventors
- 👤 Marshall G Zavertnik
- 👤 Joseph J Farina
- 👤 George F Linne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:03
CPC Classifications
H; H02; H02B; H02B1/00; H02B1/26; H02B1/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
IN A BOX: A MAIN, OPEN-TOP, LOWER BOX APART HAVING A BOTTOM AND SIDE WALLS, AND HAVING A SUBSTANTIALLY HORIZONTAL FLANGE AROUND THE TOP HAVING A SMOOTH SEALING SURFACE, AN UPSTANDING RIM ADJACENT THE HORIZONTAL FLANGE, ALSO HAVING A SMOOTH SEALING VERTICAL SURFACE, ALL OF THE FOREGOING BEING A SINGLE, UNITARY CAST METAL PIECE, AND A COVER HAVING A TOP WALL AND SIDE FLANGES, THE SIDE FLANGE HAVING BOTTOM, HORIZONTAL, SEALING SURFACES THAT MATCH WITH HORIZONTAL SURFACES ON THE FLANGE, AND HAVING VERTICAL SURFACES TO MATCH WITH THOSE ON THE FLANGE AND SAID SEALING SURFACES ON THE BOX AND COVER HAVING A WIDTH EXTENDING UNBROKEN ALL AROUND THE COVER AND BOX PART TO AFFORD SURFACES OF SUFFICIENT WIDTH TO CONSTITUTE A FRAME AND EXPLOSION BARRIER; MEANS TO CLAMP SAID COVER AND BOX PART FLANGE SURFACES IN TIGHT ENGAGEMENT; A GASKET CLAMPED BETWEEN THE TOP AND BOX PART, THE COVER BEING OF ALUMINUM AND MEANS SECURING THE GASKET TO THE COVER.
Claim 2
Dependent Claim
160 words
IN A BOX: A MAIN, OPEN-TOP, LOWER BOX APART HAVING A BOTTOM AND SIDE WALLS, AND HAVING A SUBSTANTIALLY HORIZONTAL FLANGE AROUND THE TOP HAVING A SMOOTH SEALING SURFACE, AN UPSTANDING RIM ADJACENT THE HORIZONTAL FLANGE, ALSO HAVING A SMOOTH SEALING VERTICAL SURFACE, ALL OF THE FOREGOING BEING A SINGLE, UNITARY CAST METAL PIECE, AND A COVER HAVING A TOP WALL AND SIDE FLANGES, THE SIDE FLANGE HAVING BOTTOM, HORIZONTAL, SEALING SURFACES THAT MATCH WITH HORIZONTAL SURFACES ON THE FLANGE, AND HAVING VERTICAL SURFACES TO MATCH WITH THOSE ON THE FLANGE AND SAID SEALING SURFACES ON THE BOX AND COVER HAVING A WIDTH EXTENDING UNBROKEN ALL AROUND THE COVER AND BOX PART TO AFFORD SURFACES OF SUFFICIENT WIDTH TO CONSTITUTE A FRAME AND EXPLOSION BARRIER; MEANS TO CLAMP SAID COVER AND BOX PART FLANGE SURFACES IN TIGHT ENGAGEMENT; A GASKET CLAMPED BETWEEN THE TOP AND BOX PART, THE COVER BEING OF ALUMINUM AND MEANS SECURING THE GASKET TO THE COVER.
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) | 1970-05-01 | 1970-10-31 | 1971-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-01 | 1974-10-31 | 1975-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-01 | 1978-10-31 | 1979-05-02 | $7700.00 | Window Closed / Lapsed |