US2792122A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtering device for use in the spinning of synthetic linear polymers
Assignee: Perfogit SpA
•
Filing: 1953-03-16
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Granted: 1957-05-14
•
Expires: 1973-03-16
Abstract
No abstract record available.
Inventors
- 👤 Munch Werner
- 👤 Notarbartolo Luigi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:16
CPC Classifications
D; D01; D01D; D01D1/00; D01D1/10; D01D1/106; B; B01; B01D; B01D29/00; B01D29/01; B01D29/03; B01D29/44; B01D29/46; B01D29/50; B01D29/56; B01D29/58; B01D2201/00; B01D2201/18; B01D2201/184
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
SPINNING FILTER FOR USE IN THE SPINNING OF SYNTHETIC LINEAR POLYMER FROM THE MELT, COMPRISING A CASING HAVING AN INLET OPENING FOR THE FILTRED LIQUID POLYMER, AND AN OUTLET OPENING FOR THE FILTERED LIQUID POLYMER, THE CENTERS OF SAID INLET, AND OUTLET OPENINGS DEFINING A GENERAL AXIS OF THE FILTER, A PLURALITY OF METAL PLATES HAVING EACH OF CYLINDRICAL PERIPHERAL SURFACE AND TWO PLANE PARALLEL OPPOSITE FACES, SAID PLATES BEING ASSEMBLED WITHIN SAID CASING COAXIALLY WITH AND THEIR PARALLEL SAID GENERAL AXIS OF THE FILTER AND WITH THEIR PARALLEL OPPOSITE FACES IN JUXTAPOSED CONTACTING RELATIONSHIP, SAID PARALLEL OPPOSITE FACES BEING SUFFICIENTLY SMOOTH TO EFFECT A SEAL AGAINST THE LIQUID POLYMER WHEN IN CONTACT WITH ONE ANOTHER, SAID PLATES BEING FURTHER PROVIDED WITH THROUGH BORE DISPOSED ALONG CONCENTRIC CIRCLES CENTERED ABOUT SAID GENERAL AXIS OF THE FILTER AND HAVING CIRCULAR GROOVES ON THEIR PARALLEL OPPOSITE FACES, EACH GROVE CONNECTING THE OPENINGS OF THOSE OF SAID THROUGH BORES BEING DISPOSED ON THE SAME ONE OF SAID CONCENTRIC CIRCLES, AND
Claim 2
Dependent Claim
167 words
SPINNING FILTER FOR USE IN THE SPINNING OF SYNTHETIC LINEAR POLYMER FROM THE MELT, COMPRISING A CASING HAVING AN INLET OPENING FOR THE FILTRED LIQUID POLYMER, AND AN OUTLET OPENING FOR THE FILTERED LIQUID POLYMER, THE CENTERS OF SAID INLET, AND OUTLET OPENINGS DEFINING A GENERAL AXIS OF THE FILTER, A PLURALITY OF METAL PLATES HAVING EACH OF CYLINDRICAL PERIPHERAL SURFACE AND TWO PLANE PARALLEL OPPOSITE FACES, SAID PLATES BEING ASSEMBLED WITHIN SAID CASING COAXIALLY WITH AND THEIR PARALLEL SAID GENERAL AXIS OF THE FILTER AND WITH THEIR PARALLEL OPPOSITE FACES IN JUXTAPOSED CONTACTING RELATIONSHIP, SAID PARALLEL OPPOSITE FACES BEING SUFFICIENTLY SMOOTH TO EFFECT A SEAL AGAINST THE LIQUID POLYMER WHEN IN CONTACT WITH ONE ANOTHER, SAID PLATES BEING FURTHER PROVIDED WITH THROUGH BORE DISPOSED ALONG CONCENTRIC CIRCLES CENTERED ABOUT SAID GENERAL AXIS OF THE FILTER AND HAVING CIRCULAR GROOVES ON THEIR PARALLEL OPPOSITE FACES, EACH GROVE CONNECTING THE OPENINGS OF THOSE OF SAID THROUGH BORES BEING DISPOSED ON THE SAME ONE OF SAID CONCENTRIC CIRCLES, AND
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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) | 1960-05-13 | 1960-11-12 | 1961-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-13 | 1964-11-12 | 1965-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-13 | 1968-11-12 | 1969-05-14 | $7700.00 | Window Closed / Lapsed |