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Patent US2826869A successfully refreshed from Google Patents.
US2826869A
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US
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Method and apparatus for producing tubes of vitreous materials
Assignee: GLASUND SPIEGEL MANUFACTURE AC
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Filing: 1955-03-14
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Granted: 1958-03-18
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Expires: 1975-03-14
Abstract
No abstract record available.
Inventors
- 👤 Lerch Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:11
CPC Classifications
C; C03; C03B; C03B19/00; C03B19/04; C03B7/00; C03B7/14; C03B7/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1058250A
Cited
US1377372A
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US1562551A
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FR634847A
Cited
GB361090A
Cited
US2121143A
Cited
GB504812A
Cited
US2108371A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-17 | 1961-09-16 | 1962-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-17 | 1965-09-16 | 1966-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-17 | 1969-09-16 | 1970-03-18 | $7700.00 | Window Closed / Lapsed |