Patent US2831622A successfully refreshed from Google Patents.
Patent US3090995A successfully refreshed from Google Patents.
US3090995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extruder for plastic tubing
Assignee: OI Glass Inc
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Filing: 1961-06-01
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Granted: 1963-05-28
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Expires: 1981-06-01
Abstract
No abstract record available.
Inventors
- 👤 Donald L Amsden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:22
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/03; B29C48/09; B29C48/25; B29C48/30; B29C48/32; B29C48/34; B29C48/10; B29C48/36; B29C48/475
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
80 words
PLASTIC TUBE FORMING APPARATUS COMPRISING AN ORIFICE BUSHING AND MANDREL POSITIONED RELATIVELY TO PROVIDE AN ANNULAR AXIALLY ELONGATED PASSAGEWAY WHICH PLASTIC MATETRIAL IS TO ENTER AS A PREFORMED TUBE OF PREDETERMINED WALL THICKNESS, TUBE FORMING AND WALL THICKNESS DIMENSIONING MEANS AXIALLY INWARD FROM SAID PASSAGEWAY INCLUDING AXIALLY SPACED-APART GENERALLY RADIALLY DISPOSED DISCHARGE ORIFICE FORMING SURFACES WHEREIN THE ORIFICE PROVIDES BOTH COMMUNICATION BETWEEN SAID PASSAGEWAY AND A SOURCE OF SUPPLY OF PLASTIC MATERIAL AND CONSTITUTES THE SOLE WALL THICKNESS CONTROL MEANS.
References Cited (Backward Citations)
US2626427A
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US2750625A
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US2632202A
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US2780835A
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US2871516A
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US2890483A
Cited
US3019481A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-27 | 1966-11-26 | 1967-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-27 | 1970-11-26 | 1971-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-27 | 1974-11-26 | 1975-05-28 | $7700.00 | Window Closed / Lapsed |