US2601703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for testing surface defects
Assignee: Individual
•
Filing: 1949-03-02
•
Granted: 1952-07-01
•
Expires: 1969-03-02
Abstract
No abstract record available.
Inventors
- 👤 John W Sawyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:59
CPC Classifications
B; B65; B65D; B65D81/00; B65D81/32; B65D81/3261; B65D81/3272; G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/8803
Claims Analysis
Total Claims: 0
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US2445583A
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US2453604A
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US2424278A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-01 | 1955-12-31 | 1956-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-01 | 1959-12-31 | 1960-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-01 | 1963-12-31 | 1964-07-01 | $7700.00 | Window Closed / Lapsed |