US2824488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for grading fibers
Assignee: National Research Corp
•
Filing: 1954-08-25
•
Granted: 1958-02-25
•
Expires: 1974-08-25
Abstract
No abstract record available.
Inventors
- 👤 Samuel W Bridges
- 👤 Jonathan R Roehrig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:27
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/21; G01N33/00; G01N33/36; G01N33/362
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2037044A
Cited
US2299983A
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DE731095C
Cited
US2332308A
Cited
US2413486A
Cited
US2509068A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-24 | 1961-08-26 | 1962-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-24 | 1965-08-26 | 1966-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-24 | 1969-08-26 | 1970-02-25 | $7700.00 | Window Closed / Lapsed |