US3129087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for controlled heat treatment of glass
Assignee: Corning Glass Works
•
Filing: 1961-05-15
•
Granted: 1964-04-14
•
Expires: 1981-05-15
Abstract
No abstract record available.
Inventors
- 👤 Henry E Hagy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:32
CPC Classifications
C; C03; C03B; C03B32/00; C03B32/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
APPARATUS FOR MAINTAINING AN OBJECT OF GLASS AT A VISCOSITY OF SUBSTANTIALLY CONSTANT VALUE DURING CRYSTALLIZATION COMPRISING MEANS FOR INDICATING THE RATE OF DEFORMATION OF SAID GLASS UNDER AN APPLIED STRESS AND FOR PROVIDING A SIGNAL INDICATING VARIATIONS BETWEEN SAID INDICATED RATE OF DEFORMATION AND A PREDETERMINED STANDARD RATE, AND MEANS RESPONSIVE TO SAID SIGNAL FOR REGULATING THE TEMPERATURE OF SAID GLASS OBJECT TO RESTORE ITS VISCOSITY TO SAID VALUE AND THEREBY PRODUCE A RATE OF DEFORMATION IDENTICAL WITH SAID PREDETERMINED STANDARD RATE.
Claim 2
Dependent Claim
83 words
APPARATUS FOR MAINTAINING AN OBJECT OF GLASS AT A VISCOSITY OF SUBSTANTIALLY CONSTANT VALUE DURING CRYSTALLIZATION COMPRISING MEANS FOR INDICATING THE RATE OF DEFORMATION OF SAID GLASS UNDER AN APPLIED STRESS AND FOR PROVIDING A SIGNAL INDICATING VARIATIONS BETWEEN SAID INDICATED RATE OF DEFORMATION AND A PREDETERMINED STANDARD RATE, AND MEANS RESPONSIVE TO SAID SIGNAL FOR REGULATING THE TEMPERATURE OF SAID GLASS OBJECT TO RESTORE ITS VISCOSITY TO SAID VALUE AND THEREBY PRODUCE A RATE OF DEFORMATION IDENTICAL WITH SAID PREDETERMINED STANDARD RATE.
References Cited (Backward Citations)
US1913580A
Cited
US2231723A
Cited
US2655550A
Cited
US2920971A
Cited
US2968723A
Cited
US2960802A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-14 | 1967-10-14 | 1968-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-14 | 1971-10-14 | 1972-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-14 | 1975-10-14 | 1976-04-14 | $7700.00 | Window Closed / Lapsed |