Patent US2557530A successfully refreshed from Google Patents.
US2557530A
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US
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Electric heating element
Assignee: Eastman Kodak Co
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Filing: 1946-09-07
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Granted: 1951-06-19
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Expires: 1966-09-07
Abstract
No abstract record available.
Inventors
- 👤 George H Bancroft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:04
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/24; C23C14/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1323576A
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US923425A
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FR411417A
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US1291106A
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US1279146A
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CH83973A
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US1839518A
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US2013755A
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US2100045A
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US2433922A
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US2430994A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-18 | 1954-12-18 | 1955-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-18 | 1958-12-18 | 1959-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-18 | 1962-12-18 | 1963-06-19 | $7700.00 | Window Closed / Lapsed |