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US2900730A
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Proportion measuring device
Assignee: Clay Adams Inc
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Filing: 1957-04-19
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Granted: 1959-08-25
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Expires: 1977-04-19
Abstract
No abstract record available.
Inventors
- 👤 Marvin A Gilman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:41
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/04; G01N15/05; G01N33/00; G01N33/48; G01N33/483; G01N33/487; G01N33/49; G01N33/491
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US581472A
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US1195212A
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US806819A
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US1435389A
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US1643426A
Cited
US1980930A
Cited
FR937335A
Cited
US2840915A
Cited
US2741913A
Cited
US2750671A
Cited
US2831252A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |