US3359192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of manufacturing a sieve plate having apertures of nonuniform crosssection
Assignee: Balco Filtertechnik GmbH
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Filing: 1965-03-12
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Granted: 1967-12-19
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Expires: 1985-03-12
Abstract
No abstract record available.
Inventors
- 👤 Heinrich Hans-Joachim
- 👤 Dietzel Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:40
CPC Classifications
C; C25; C25F; C25F3/00; C25F3/02; C25F3/14; B; B01; B01D; B01D39/00; B01D39/10; C23; C23F; C23F1/00; C23F1/02; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12361; Y10T428/12389
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
144 words
A PROCESS FOR MAKING A SIEVE PLATE WITH A MULTIPLICITY OF ORIFICES, COMPRISING THE STEPS OF COVERING ONE SURFACE OF A METALLIC FOIL WITH A FIRST MASKING LAYER HAVING A MULTIPLICITY OF PERFORATIONS, COVERING ONE SURFACE OF A METALLIC FOIL WITH A FIRST MASKING LAYER HAVING A MULTIPLICITY OF PERFORATIONS, COVERING THE OPPOSITE SIDE OF SAID FOIL WITH A SECOND MASKING LAYER HAVING A MULTIPLICITY OF PERFORATIONS ALIGNED WITH THOSE OF SAID FIRST LAYER, ERODING SAID ONE SURFACE THROUGH THE PERFORATIONS OF SAID FIRST LAYER TO A LIMITED DEPTH LESS THAN THE THICKNESS OF SAID FOIL, PACKING THE RESULTING EROSIONS WITH A PROTECTIVE AGENT, TERMINATING THE EROSION OF SAID ONE SURFACE THROUGH SAID FIRST LAYER PRIOR TO THROUGHGOING PASSAGE, ERODING SAID OPPOSITE SIDE THROUGH THE PERFORATIONS OF SAID SECOND LAYER TO THE LEVEL OF THE EROSIONS OF SAID ONE SIDE WHEREBY THROUGHGOING PASSAGES CONVERGING
Claim 2
Dependent Claim
144 words
A PROCESS FOR MAKING A SIEVE PLATE WITH A MULTIPLICITY OF ORIFICES, COMPRISING THE STEPS OF COVERING ONE SURFACE OF A METALLIC FOIL WITH A FIRST MASKING LAYER HAVING A MULTIPLICITY OF PERFORATIONS, COVERING ONE SURFACE OF A METALLIC FOIL WITH A FIRST MASKING LAYER HAVING A MULTIPLICITY OF PERFORATIONS, COVERING THE OPPOSITE SIDE OF SAID FOIL WITH A SECOND MASKING LAYER HAVING A MULTIPLICITY OF PERFORATIONS ALIGNED WITH THOSE OF SAID FIRST LAYER, ERODING SAID ONE SURFACE THROUGH THE PERFORATIONS OF SAID FIRST LAYER TO A LIMITED DEPTH LESS THAN THE THICKNESS OF SAID FOIL, PACKING THE RESULTING EROSIONS WITH A PROTECTIVE AGENT, TERMINATING THE EROSION OF SAID ONE SURFACE THROUGH SAID FIRST LAYER PRIOR TO THROUGHGOING PASSAGE, ERODING SAID OPPOSITE SIDE THROUGH THE PERFORATIONS OF SAID SECOND LAYER TO THE LEVEL OF THE EROSIONS OF SAID ONE SIDE WHEREBY THROUGHGOING PASSAGES CONVERGING
Claim 3
Dependent Claim
17 words
A PROCESS AS DEFINED IN CLAIM 1 WHEREIN THE EROSION OF SAID OPPOSITE SIDE IS PERFORMED ELECTROLYTICALLY.
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) | 1970-12-18 | 1971-06-19 | 1971-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-18 | 1975-06-19 | 1975-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-18 | 1979-06-19 | 1979-12-19 | $7700.00 | Window Closed / Lapsed |