Patent US2898893A successfully refreshed from Google Patents.
US2377494A
Expired / Lapsed
US
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Apparatus for drawing glass tubing
Assignee: Corning Glass Works
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Filing: 1941-05-07
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Granted: 1945-06-05
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Expires: 1961-05-07
Abstract
No abstract record available.
Inventors
- 👤 Charles H Greene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:31
CPC Classifications
C; C03; C03B; C03B17/00; C03B17/04; Y; Y10; Y10S; Y10S264/00; Y10S264/78
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1948-06-04 | 1948-12-04 | 1949-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-06-04 | 1952-12-04 | 1953-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-06-04 | 1956-12-04 | 1957-06-05 | $7700.00 | Window Closed / Lapsed |