US3149949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Downflow sheet drawing method and apparatus
Assignee: Corning Glass Works
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Filing: 1961-02-27
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Granted: 1964-09-22
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Expires: 1981-02-27
Abstract
No abstract record available.
Inventors
- 👤 Stuart M Dockerty
- 👤 George C Shay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:32
CPC Classifications
C; C03; C03B; C03B17/00; C03B17/06; C03B17/064
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
96 words
AN IMPROVED METHOD OF PRODUCING SHEET GLASS WHICH COMPRISES, FORMING A LONGITUDINALLY-EXTENDING RESERVOIR BODY OF MOLTEN GLASS, CONTINUOUSLY INTRODUCNG MOLTEN GLASS INTO SUCH RESERVOIR BODY BELOW THE SURFACE THEREOF, SIMULTANEOUSLY ISSUING A PLURALITY OF SEPARATE AND DISTINCT LONGITUDINALLY SPACED-APART STREAMS OF MOLTEN GLASS UPWARDLY FROM THE RESERVOIR BODY ALONG ITS LONGITUDINAL EXTENT INTO A COMMON FORMING PPOL ABOVE SUCH RESERVOIR BODY, FLOWING THE MOLTEN GLASS-DOWNWARDLY FROM THE UPPER SURFACE OF SUCH FORMING POOL ALONG TWO OPPOSITELY DISPOSED DOWNWARDLY CONVERGING PATHS, AND JOINING THE MOLTEN GLASS FLOWING ALONG SUCH PATHS TO FORM A SINGLE SHEET OF GLASS.
Claim 2
Dependent Claim
96 words
AN IMPROVED METHOD OF PRODUCING SHEET GLASS WHICH COMPRISES, FORMING A LONGITUDINALLY-EXTENDING RESERVOIR BODY OF MOLTEN GLASS, CONTINUOUSLY INTRODUCNG MOLTEN GLASS INTO SUCH RESERVOIR BODY BELOW THE SURFACE THEREOF, SIMULTANEOUSLY ISSUING A PLURALITY OF SEPARATE AND DISTINCT LONGITUDINALLY SPACED-APART STREAMS OF MOLTEN GLASS UPWARDLY FROM THE RESERVOIR BODY ALONG ITS LONGITUDINAL EXTENT INTO A COMMON FORMING PPOL ABOVE SUCH RESERVOIR BODY, FLOWING THE MOLTEN GLASS-DOWNWARDLY FROM THE UPPER SURFACE OF SUCH FORMING POOL ALONG TWO OPPOSITELY DISPOSED DOWNWARDLY CONVERGING PATHS, AND JOINING THE MOLTEN GLASS FLOWING ALONG SUCH PATHS TO FORM A SINGLE SHEET OF GLASS.
Claim 3
Dependent Claim
81 words
APPARATUS FOR PRODUCING SHEET GLASS WHICH COMPRISES, A HOLLOW BODY MEMBER HAVING AN UPPER WALL PORTION COMMUNICATING WITH A PAIR OF DOWNWARDLY CONVERGING SIDE WALL PORTIONS, A SUPPLY RESERVOIR FORMED WITHIN SAID HOLLOW BODY MEMBER, AN UPWARDLY OPEN RECESSED PORTION FORMED IN SAID UPPER WALL PORTION, A PLURALITY OF PASSAGES EXTENDING THROUGH SAID UPPER WALL PORTION AND COMMUNICATING BETWEEN SAID SUPPLY RESERVOIR AND SAID RECESSED PORTION, AND MEANS COMMUNICATING WITH ONE END OF SAID SUPPLY RESERVOIR FOR INTRODUCING MOLTEN GLASS THEREWITHIN.
Claim 4
Dependent Claim
81 words
APPARATUS FOR PRODUCING SHEET GLASS WHICH COMPRISES, A HOLLOW BODY MEMBER HAVING AN UPPER WALL PORTION COMMUNICATING WITH A PAIR OF DOWNWARDLY CONVERGING SIDE WALL PORTIONS, A SUPPLY RESERVOIR FORMED WITHIN SAID HOLLOW BODY MEMBER, AN UPWARDLY OPEN RECESSED PORTION FORMED IN SAID UPPER WALL PORTION, A PLURALITY OF PASSAGES EXTENDING THROUGH SAID UPPER WALL PORTION AND COMMUNICATING BETWEEN SAID SUPPLY RESERVOIR AND SAID RECESSED PORTION, AND MEANS COMMUNICATING WITH ONE END OF SAID SUPPLY RESERVOIR FOR INTRODUCING MOLTEN GLASS THEREWITHIN.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-22 | 1968-03-23 | 1968-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-22 | 1972-03-23 | 1972-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-22 | 1976-03-23 | 1976-09-22 | $7700.00 | Window Closed / Lapsed |