US3214254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precision glass molding process and apparatus
Assignee: General Precision Inc
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Filing: 1961-12-28
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Granted: 1965-10-26
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Expires: 1981-12-28
Abstract
No abstract record available.
Inventors
- 👤 Richard C Remington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:57
CPC Classifications
C; C03; C03B; C03B19/00; C03B19/02; C03B19/06; C03B32/00; C03B40/00; H; H01; H01J; H01J5/00; H01J5/20; H01J5/22; H01J5/26; H01J2893/00; H01J2893/0033; H01J2893/0037; H01J2893/0041; H01J2893/0043
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
105 words
THE METHOD OF MOLDING A GLASS ARTICLES, WHICH INCLUDES THE STEPS OF, SELECTING A MOLD OF METAL PARTS HAVING A COEFFICIENT OF EXPANSION LESS THAN GLASS AND HAVING A CLOSED CAVITY THEREIN, POSITIONING GLASS IN SAID CAVITY, SLIDABLY MOUNTING A WEIGHTED PLUNGER ON SAID MOLD WITH ONE END THEREOF HAVING A PERIPHERAL FACE SEALINGLY ENGAGING THE ADJACENT MOLD PORTION AND HAVING AN END FACE ENGAGING SAID GLASS TO EXERT A CONTINUOUS PRESSURE THEREON, ENCLOSING SAID MOLD IN A SEALED CHAMBER HAVING AN INACTIVE ENVIRONMENT, AND APPLYING HEAT TO SAID GLASS UNTIL IT FLOWS UNDER THE PRESSURE APPLIED BY SAID PLUNGER AND FILLS THE MOLD CAVITY.
Claim 2
Independent Claim
105 words
THE METHOD OF MOLDING A GLASS ARTICLES, WHICH INCLUDES THE STEPS OF, SELECTING A MOLD OF METAL PARTS HAVING A COEFFICIENT OF EXPANSION LESS THAN GLASS AND HAVING A CLOSED CAVITY THEREIN, POSITIONING GLASS IN SAID CAVITY, SLIDABLY MOUNTING A WEIGHTED PLUNGER ON SAID MOLD WITH ONE END THEREOF HAVING A PERIPHERAL FACE SEALINGLY ENGAGING THE ADJACENT MOLD PORTION AND HAVING AN END FACE ENGAGING SAID GLASS TO EXERT A CONTINUOUS PRESSURE THEREON, ENCLOSING SAID MOLD IN A SEALED CHAMBER HAVING AN INACTIVE ENVIRONMENT, AND APPLYING HEAT TO SAID GLASS UNTIL IT FLOWS UNDER THE PRESSURE APPLIED BY SAID PLUNGER AND FILLS THE MOLD CAVITY.
Claim 3
Dependent Claim
98 words
APPARATUS FOR MOLDING A GLASS ARTICLE, WHICH INCLUDES THE COMBINATION OF, A SEALED CHAMBER HAVING AN INACTIVE ENVIRONMENT, A MOLD OF METAL PARTS HAVING AN ENCLOSED INTERIOR CAVITY THEREIN SUPPORTED WITHIN SAID CHAMBER, A PLUNGER HAVING AN END PORTION WITH AN END FACE SLIDABLY MOUNTED IN A BORE IN A PART OF SAID MOLD WITH SAID END PORTION SEALINGLY ENGAGING THE BORE SURFACES TO SEAL THE CAVITY AND WITH SAID END FACE FACING SAID CAVITY IN POSITION TO EXERT A CONTINUOUS PRESSURE ON GLASS WHEN DISPOSED WITHIN THE CAVITY, AND HEATING MEANS FOR HEATING GLASS WITHIN SAID CAVITY.
Claim 4
Dependent Claim
98 words
APPARATUS FOR MOLDING A GLASS ARTICLE, WHICH INCLUDES THE COMBINATION OF, A SEALED CHAMBER HAVING AN INACTIVE ENVIRONMENT, A MOLD OF METAL PARTS HAVING AN ENCLOSED INTERIOR CAVITY THEREIN SUPPORTED WITHIN SAID CHAMBER, A PLUNGER HAVING AN END PORTION WITH AN END FACE SLIDABLY MOUNTED IN A BORE IN A PART OF SAID MOLD WITH SAID END PORTION SEALINGLY ENGAGING THE BORE SURFACES TO SEAL THE CAVITY AND WITH SAID END FACE FACING SAID CAVITY IN POSITION TO EXERT A CONTINUOUS PRESSURE ON GLASS WHEN DISPOSED WITHIN THE CAVITY, AND HEATING MEANS FOR HEATING GLASS WITHIN SAID CAVITY.
References Cited (Backward Citations)
US674378A
Cited
US2386820A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |