Patent US2544947A successfully refreshed from Google Patents.
US2544947A
Expired / Lapsed
US
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Lehr temperature control
Assignee: Pittsburgh Corning LLC
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Filing: 1946-01-19
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Granted: 1951-03-13
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Expires: 1966-01-19
Abstract
No abstract record available.
Inventors
- 👤 Arvid H Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:34
CPC Classifications
C; C03; C03B; C03B25/00; C03B25/04; C03B25/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1214217A
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US1232798A
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US1641899A
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US1837311A
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US1938889A
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US2039429A
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US2172771A
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US2262243A
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US2275263A
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US2401582A
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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) | 1954-03-12 | 1954-09-11 | 1955-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-12 | 1958-09-11 | 1959-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-12 | 1962-09-11 | 1963-03-13 | $7700.00 | Window Closed / Lapsed |