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US2693755A
Expired / Lapsed
US
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Divided ductor roll
Assignee: F X HOOPER Co Inc
•
Filing: 1949-09-15
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Granted: 1954-11-09
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Expires: 1969-09-15
Abstract
No abstract record available.
Inventors
- 👤 Fitchett Thomas Somerset
- 👤 Rockstrom Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:59
CPC Classifications
B; B41; B41F; B41F31/00; B41F31/02; B41F31/14; B41F31/10; B41F31/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US664578A
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US1262709A
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US1437695A
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US1977375A
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US1982830A
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US1996607A
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US2083542A
Cited
GB601883A
Cited
US2526254A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-08 | 1958-05-10 | 1958-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-08 | 1962-05-10 | 1962-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-08 | 1966-05-10 | 1966-11-09 | $7700.00 | Window Closed / Lapsed |