Patent US3277529A successfully refreshed from Google Patents.
US3277529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of liners for double barrel extruders
Assignee: Infineon Technologies Americas Corp
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Filing: 1963-12-09
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Granted: 1966-10-11
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Expires: 1983-12-09
Abstract
No abstract record available.
Inventors
- 👤 David W Linder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:41
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/08; F04C2/082; F04C2/086; B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/68; B29C48/6801; B29C48/682; B29C48/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A LINER FOR A DOUBLE-BARREL EXTRUDER COMPRISING A PAIR OF PARALLEL HOLLOW TUBULAR SEGMENTS WELDED TOGETHER SO AS TO FORM PARALLEL CYLINDRICAL PASSAGEWAYS WITH A CENTRAL LONGITUDINAL PASSAGEWAY THEREBETWEEN, EACH OF SAID SEGMENTS COMPRISING A METALLIC BODY LINED ON ITS INSIDE WALLS WITH A WEAR-RESISTANT METALLIC LAYER HAVING GENERALLY CYLINDRICAL CONFIGURATION AND INCLUDING A PAIR OF SPACED, LONGITUDINALLY EXTENDING SHOULDERS POSITIONED ADJACENT SAID CENTRAL LONGITUDINAL PASSAGEWAY, THE SHOULDERS OF THE RESPECTIVE TUBULAR SEGMENTS BEING ALIGNED WITH AND WELDED TO ONE ANOTHER, THEREBY PROVIDING REL-
Claim 2
Dependent Claim
84 words
A LINER FOR A DOUBLE-BARREL EXTRUDER COMPRISING A PAIR OF PARALLEL HOLLOW TUBULAR SEGMENTS WELDED TOGETHER SO AS TO FORM PARALLEL CYLINDRICAL PASSAGEWAYS WITH A CENTRAL LONGITUDINAL PASSAGEWAY THEREBETWEEN, EACH OF SAID SEGMENTS COMPRISING A METALLIC BODY LINED ON ITS INSIDE WALLS WITH A WEAR-RESISTANT METALLIC LAYER HAVING GENERALLY CYLINDRICAL CONFIGURATION AND INCLUDING A PAIR OF SPACED, LONGITUDINALLY EXTENDING SHOULDERS POSITIONED ADJACENT SAID CENTRAL LONGITUDINAL PASSAGEWAY, THE SHOULDERS OF THE RESPECTIVE TUBULAR SEGMENTS BEING ALIGNED WITH AND WELDED TO ONE ANOTHER, THEREBY PROVIDING REL-
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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) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |