US3253899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for releasing stresses produced in glass during cooling in a glass shaping mold
Assignee: Permaglass Inc
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Filing: 1964-05-19
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Granted: 1966-05-31
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Expires: 1984-05-19
Abstract
No abstract record available.
Inventors
- 👤 Harold A Mcmaster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:00
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/02; C03B23/023; C03B23/025; C03B23/0252; C03B23/027
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
106 words
MEANS FOR DISENGAGING A GLASS SHEET AND A MOLD HAVING A PERIPHERAL SURFACE UPON WHICH THE EDGES OF THE GLASS SHEET REST AFTER HEAT TREATMENT FOR BENDING THE GLASS TO A CONFIGURATION DETRMINED BY THE PERIPHERAL SURFACE OF THE MOLD, SAID MEANS COMPRISING, IN COMBINATION, THERMALLY RESPONSIVE MEANS CARRIED ON SAID MOLD AND PROVIDING A MOVING FORCE UPON A RAPID REDUTION IN ENVIRONMENTAL TEMPERATURE, MECHANICAL MEANS MOUNTED ON SAID MOLD FOR EFFECTING RELATIVELY MOVEMENT BETWEEN SAID GLASS SHEET AND AT LEAST A MAJOR PART OF THE PERIPHERAL SURFACE OF SAID MOLD FOR DISENGAGING THE SAME, AND MEANS ACTUATING SAID MECHANICAL MEANS IN RESPONSE TO SUCH FORCE.
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) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |