Patent US2972976A successfully refreshed from Google Patents.
Patent US2926843A successfully refreshed from Google Patents.
US2926843A
Expired / Lapsed
US
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Nomographic device for determining the length of coiled material
Assignee: MERLE HILL
•
Filing: 1957-06-12
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Granted: 1960-03-01
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Expires: 1977-06-12
Abstract
No abstract record available.
Inventors
- 👤 Gerald A Francis
- 👤 Arthur A Underwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:09
CPC Classifications
G; G06; G06G; G06G1/00; G06G1/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1160051A
Cited
US1279829A
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US1488190A
Cited
US1404019A
Cited
US1667812A
Cited
GB452655A
Cited
US2666577A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-01 | 1963-08-31 | 1964-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-01 | 1967-08-31 | 1968-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-01 | 1971-08-31 | 1972-03-01 | $7700.00 | Window Closed / Lapsed |