Patent US2968894A successfully refreshed from Google Patents.
US2968894A
Expired / Lapsed
US
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Annealing lehr
Assignee: Selas Corp of America
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Filing: 1955-03-04
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Granted: 1961-01-24
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Expires: 1975-03-04
Abstract
No abstract record available.
Inventors
- 👤 Frederic O Hess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:22
CPC Classifications
C; C03; C03B; C03B25/00; C03B25/04; C03B25/06; C03B25/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2437492A
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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) | 1964-01-24 | 1964-07-25 | 1965-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-24 | 1968-07-25 | 1969-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-24 | 1972-07-25 | 1973-01-24 | $7700.00 | Window Closed / Lapsed |