US3362435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smooth precision formed body of vitreous material and method for producing it
Assignee: Ronor SA
•
Filing: 1964-04-06
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Granted: 1968-01-09
•
Expires: 1984-04-06
Abstract
No abstract record available.
Inventors
- 👤 Meyer Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:18
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/04; C03B23/09; C03B23/095; C03B23/097; C03B23/098
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
200 words
A METHOD OF MAKING A SMOOTH, PRECISION-FORMED INNER SURFACE CONNECTIVE OR CLOSURE END SECTION ON A HOLLOW BODY OF VITREOUS MATERIAL COMPRISING: INSERTING A METAL MANDRIL HAVING A PRECISION-FORMED ACCURATELY DIMENSIONED TAPERED OUTER SURFACE INTO ONE END OF A CYCLICALLY SYMMETRICAL HOLLOW VITREOUS BODY HAVING INTERIOR DIMENSIONS SLIGHTLY LARGER THAN SAID OUTER SURFACE WITH AN END OF SAID OUTER SURFACE EXTENDING AXIALLY BEYOND SAID ONE END OF SAID HOLLOW BODY, SAID MANDRIL WHEN INSERTED INTO SAID ONE END BEING PREHEATED TO A TEMPERATURE WHICH IS NOT SUBSTANTIALLY HIGHER THAN THE STRAIN POINT AND NOT MORE THAN ABOUT 150*C. LOWER THAN THE STRAIN POINT OF SAID VITREOUS MATERIAL, APPLYING A SUCTION TO THE INTERIOR OF SAID HOLLOW BODY AT A POINT SPACED FROM SAID ONE END OF SAID BODY WHILE APPLYING HEAT TO SAID ONE END OF SAID BODY TO SOFTEN SAID ONE END AND DRAW SAID ONE END OF SAID BODY INTO SEALING ENGAGEMENT WITH SAID OUTER SURFACES OF SAID MANDRIL, AND FITTING SAID END SECTION OF SAID HOLLOW BODY TO SAID OUTER SURFACE OF SAID MANDRIL BY CONTINUOUSLY APPLYING SAID SUCTION AND MOVING A HEATING ZONE AXIALLY THE LENGTH OF SAID END SECTION IN THE DIRECTION OF SAID SUCTION.
Claim 2
Independent Claim
200 words
A METHOD OF MAKING A SMOOTH, PRECISION-FORMED INNER SURFACE CONNECTIVE OR CLOSURE END SECTION ON A HOLLOW BODY OF VITREOUS MATERIAL COMPRISING: INSERTING A METAL MANDRIL HAVING A PRECISION-FORMED ACCURATELY DIMENSIONED TAPERED OUTER SURFACE INTO ONE END OF A CYCLICALLY SYMMETRICAL HOLLOW VITREOUS BODY HAVING INTERIOR DIMENSIONS SLIGHTLY LARGER THAN SAID OUTER SURFACE WITH AN END OF SAID OUTER SURFACE EXTENDING AXIALLY BEYOND SAID ONE END OF SAID HOLLOW BODY, SAID MANDRIL WHEN INSERTED INTO SAID ONE END BEING PREHEATED TO A TEMPERATURE WHICH IS NOT SUBSTANTIALLY HIGHER THAN THE STRAIN POINT AND NOT MORE THAN ABOUT 150*C. LOWER THAN THE STRAIN POINT OF SAID VITREOUS MATERIAL, APPLYING A SUCTION TO THE INTERIOR OF SAID HOLLOW BODY AT A POINT SPACED FROM SAID ONE END OF SAID BODY WHILE APPLYING HEAT TO SAID ONE END OF SAID BODY TO SOFTEN SAID ONE END AND DRAW SAID ONE END OF SAID BODY INTO SEALING ENGAGEMENT WITH SAID OUTER SURFACES OF SAID MANDRIL, AND FITTING SAID END SECTION OF SAID HOLLOW BODY TO SAID OUTER SURFACE OF SAID MANDRIL BY CONTINUOUSLY APPLYING SAID SUCTION AND MOVING A HEATING ZONE AXIALLY THE LENGTH OF SAID END SECTION IN THE DIRECTION OF SAID SUCTION.
References Cited (Backward Citations)
GB573235A
Cited
US2754626A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-08 | 1971-07-10 | 1972-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-08 | 1975-07-10 | 1976-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-08 | 1979-07-10 | 1980-01-09 | $7700.00 | Window Closed / Lapsed |