US3190739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube drawing
Assignee: Corning Glass Works
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Filing: 1961-11-15
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Granted: 1965-06-22
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Expires: 1981-11-15
Abstract
No abstract record available.
Inventors
- 👤 Richmond W Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:13
CPC Classifications
C; C03; C03B; C03B17/00; C03B17/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
THE METHOD OF EXPANDING MOLTEN GLASS TUBING, AS IT IS BEING CONTINUOUSLY DRAWN, TO A DESIRED CROSS SECTIONAL SIZE AND CONFIGURATION; WHICH INCLUDES PASSING SUCH TUBING THROUGH THE BORE OF A TUBULAR DIE WHOSE BORE AFFORDS A SPACE OF A CROSS SECTION AND SIZE SUBSTANTIALLY CORRESPONDING TO THE TRANSVERSE CONFIGURATION AND SIZE TO WHICH THE TUBING IS TO BE EXPANDED, SUPPLYING ATMOSPHERIC PRESSURE INTERNALLY OF THE TUBING BEING FORMED WHILE CREATING NEGATIVE PRESSURE IN SAID SPACE TO EXPAND THE TUBING INTO CONTACT WITH SUCH DIE AND MAINTAINING THE DIE AT A TEMPERATURE AT WHICH IT CHILLS THE TUBING CONTACTED BY IT TO CAUSE THE SAME TO CONTRACT AWAY FROM SUCH DIE SLIGHTLY DURING ITS CONTINUED PASSAGE THERETHROUGH.
Claim 2
Independent Claim
117 words
THE METHOD OF EXPANDING MOLTEN GLASS TUBING, AS IT IS BEING CONTINUOUSLY DRAWN, TO A DESIRED CROSS SECTIONAL SIZE AND CONFIGURATION; WHICH INCLUDES PASSING SUCH TUBING THROUGH THE BORE OF A TUBULAR DIE WHOSE BORE AFFORDS A SPACE OF A CROSS SECTION AND SIZE SUBSTANTIALLY CORRESPONDING TO THE TRANSVERSE CONFIGURATION AND SIZE TO WHICH THE TUBING IS TO BE EXPANDED, SUPPLYING ATMOSPHERIC PRESSURE INTERNALLY OF THE TUBING BEING FORMED WHILE CREATING NEGATIVE PRESSURE IN SAID SPACE TO EXPAND THE TUBING INTO CONTACT WITH SUCH DIE AND MAINTAINING THE DIE AT A TEMPERATURE AT WHICH IT CHILLS THE TUBING CONTACTED BY IT TO CAUSE THE SAME TO CONTRACT AWAY FROM SUCH DIE SLIGHTLY DURING ITS CONTINUED PASSAGE THERETHROUGH.
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) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |