US3081493A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making by rotary casting a buoyant body of plastic furnished with a passage therethrough
Assignee: Individual
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Filing: 1960-05-27
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Granted: 1963-03-19
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Expires: 1980-05-27
Abstract
No abstract record available.
Inventors
- 👤 Beyer-Olsen Knut
- 👤 Steffenssen Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:49
CPC Classifications
B; B29; B29C; B29C66/00; A; A01; A01K; A01K75/00; A01K75/04; A01K93/00; B29C41/00; B29C41/02; B29C41/20; B29C66/50; B29C66/51; B29C66/52; B29C66/522; B29C66/54; B29C66/70; B29C66/73; B29C66/739; B29C66/7394; B29C66/73941; B29C70/00; B29C70/68; B29C70/74; B29C70/742; B29C41/04; B29L; B29L2031/00; B29L2031/706; Y; Y10; Y10S; Y10S264/00; Y10S264/76
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
177 words
A MOLD STRUCTURE FOR MAKING A BUOYANT BODY OF PLASTIC HAVING A PASSAGE THERETHROUGH FOR A ROPE OR THE LIKE, COMPRISING A TWO-PART SHELL-SHAPED MOLD, TWO KNOBS, AND MEANS FOR ATTACHING SAID KNOBS TO THE INSIDE SURFACE OF ONE PART OF SAID TWO-PART MOLD, WHEREBY A TUBE-SHAPED PLASTIC ELEMENT CAN BE MOUNTED ON SAID KNOBS AND SAID KNOBS ATTACHED TO THE INSIDE SURFACE OF SAID ONE MOLD PART, OR SAID KNOBS CAN BE ATTACHED TO THE INSIDE SURFACE OF SAID ONE MOLD PART AND A TUBE-SHAPED PLASTIC ELEMENT MOUNTED BETWEEN THE KNOBS, AND THEREAFTER THE MOLD CAN BE ASSEMBLED WITH A THERMOPLASTIC MATERIAL AND HEATED AND ROTATED TO CAUSE THE THERMOPLASTIC MATERIAL TO CLING TO THE INTERIOR SURFACE OF THE MOLD AND THE INTERNAL SURFACES OF THE ENDS OF THE TUBE-SHAPED ELEMENT SO THAT THE ENDS OF THE TUBE-SHAPED ELEMENT ARE EMBEDDED IN THE THERMOPLASTIC MATERIAL WHILE THE OPENINGS IN THE ENDS OF THE TUBES ARE LEFT FREE, AFTER WHICH THE MOLD PARTS CAN BE SEPARATED AND THE BUOYANT BODY REMOVED FROM THE MOLD AND THE KNOBS.
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) | 1966-03-18 | 1966-09-17 | 1967-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-18 | 1970-09-17 | 1971-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-18 | 1974-09-17 | 1975-03-19 | $7700.00 | Window Closed / Lapsed |