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Patent US2717062A successfully refreshed from Google Patents.
US2717062A
Expired / Lapsed
US
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Fire door
Assignee: DUSING AND HUNT Inc
•
Filing: 1950-04-28
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Granted: 1955-09-06
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Expires: 1970-04-28
Abstract
No abstract record available.
Inventors
- 👤 Leon F Dusing
- 👤 Felix H Saino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:26
CPC Classifications
E; E06; E06B; E06B5/00; E06B5/10; E06B5/16; E06B3/00; E06B3/70; E06B3/7015; E06B2003/7036
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US513247A
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US753209A
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US840011A
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US1100555A
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US1183586A
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US1581038A
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US1802600A
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US1919702A
Cited
US2248777A
Cited
US2593050A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-09-05 | 1959-03-07 | 1959-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-05 | 1963-03-07 | 1963-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-05 | 1967-03-07 | 1967-09-06 | $7700.00 | Window Closed / Lapsed |