US2821006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture, from plastic material, of hollow bodies having projections protruding from the inner surface
Assignee: BASF SE
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Filing: 1953-06-23
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Granted: 1958-01-28
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Expires: 1973-06-23
Abstract
No abstract record available.
Inventors
- 👤 Wilhelm Dr Pfannmueller
- 👤 Alois Letschert
- 👤 Theophil Fuchs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:37
CPC Classifications
B; B28; B28B; B28B11/00; B28B11/12; B28B17/00; B28B17/0036; B01; B01J; B01J19/00; B01J19/30; B28B11/08; B28B11/125; B28B21/00; B28B21/92; B01J2219/00; B01J2219/30; B01J2219/302; B01J2219/30223; B01J2219/304; B01J2219/30416; Y; Y10; Y10S; Y10S261/00; Y10S261/72; Y10S264/00; Y10S264/70; Y10S425/00; Y10S425/058
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
114 words
THE METHOD OF MANUFACTURING A HALLOW BODY HAVING A PLURALITY OF TONGUE-LIKE PROJECTING EXTENDING INWARDLY FROM THE INNER SURFACE OF THE BODY FROM PLASTIC MATERIAL WHICH COMPRISES: SUPPORTING THE INNER WALL OF A HOLLOW BODY OF A SOFT PLASTIC MATERIAL BY A SLEEVE POSITIONED THEREIN AND HAVING A PLURALITY OF OPENINGS CORRESPONDING IN DIMENSIONS TO SAID PROJECTIONS, SAID OPENINGS COMMUNICATING WITH AN END OF SAID SLEEVE FOR SLIDABLY REMOVING SAID PROJECTIONS THEREFROM; CUTTING PORTIONS OF SAID BODY CORRESPONDING IN DIMENSIONS TO SAID PROJECTIONS AND BENDING SAID PORTIONS INWARDLY THROUGH SAID OPENINGS IN ONE OPERATION BY RECIPROCATING CUTTERS SIMULTANEOUSLY MOVED INWARDLY ON SAID BODY FROM THE OUTER SURFACE THEREOF AT POINTS THEREAROUND AND THEM SIMULTANEOUSLY
References Cited (Backward Citations)
US393721A
Cited
US1705093A
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US2075038A
Cited
US2217327A
Cited
US2326536A
Cited
US2653664A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |