Patent US2735304A successfully refreshed from Google Patents.
US2735304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
toppfb haw
Assignee: —
•
Filing: —
•
Granted: 1956-02-21
•
Expires: 1973-02-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:20
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/20; G01N33/204
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
THE METHOD OF DETERMINING THE GRAIN SIZE OF A TEST SAMPLE OF A ROLLED METAL HAVING A POLYHEDRAL STRUCTURE WHICH COMPRISES STRETCHING THE TEST SAMPLE BY A PREDETERMINED AMOUNT AND QUANTITATIVELY MEASURING THE SURFACE ROUGHNESS OF THE SAMPLE AFTER SUCH STRETCHING, WHEREBY THE GRAIN SIZE OF SUCH TEST SAMPLE MAY BE DETERMINED BY
Claim 2
Independent Claim
53 words
THE METHOD OF DETERMINING THE GRAIN SIZE OF A TEST SAMPLE OF A ROLLED METAL HAVING A POLYHEDRAL STRUCTURE WHICH COMPRISES STRETCHING THE TEST SAMPLE BY A PREDETERMINED AMOUNT AND QUANTITATIVELY MEASURING THE SURFACE ROUGHNESS OF THE SAMPLE AFTER SUCH STRETCHING, WHEREBY THE GRAIN SIZE OF SUCH TEST SAMPLE MAY BE DETERMINED BY
References Cited (Backward Citations)
US2397923A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-20 | 1959-08-22 | 1960-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-20 | 1963-08-22 | 1964-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-20 | 1967-08-22 | 1968-02-21 | $7700.00 | Window Closed / Lapsed |