US2765652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flaw detection
Assignee: Libbey Owens Ford Glass Co
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Filing: 1954-03-26
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Granted: 1956-10-09
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Expires: 1974-03-26
Abstract
No abstract record available.
Inventors
- 👤 William C Levengood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 03:05
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/91; Y; Y10; Y10S; Y10S252/00; Y10S252/96
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
THE METHOD OF DETECTING SUBMICROSCOPIC CRACKS IN A SMOOTH BODY, INCLUDING THE STEPS OF CLEANING A SURFACE OF THE BODY WITH A NONSCRATCHING CLEANING AGENT, RINSING THE CLEANSING AGENT FROM THE SUFACE, AND APPLYING A COATING OF NOT SUBSTANTIALY MORE THAN 400 ANGSTROM UNITS THICKNESS OF A SILVER SOLUTION TO THE SURFACE OF THE BODY TO RENDER THE SUBMICROSCOPIC CRACKS VISIBLE TO THE EYE.
Claim 2
Independent Claim
64 words
THE METHOD OF DETECTING SUBMICROSCOPIC CRACKS IN A SMOOTH BODY, INCLUDING THE STEPS OF CLEANING A SURFACE OF THE BODY WITH A NONSCRATCHING CLEANING AGENT, RINSING THE CLEANSING AGENT FROM THE SUFACE, AND APPLYING A COATING OF NOT SUBSTANTIALY MORE THAN 400 ANGSTROM UNITS THICKNESS OF A SILVER SOLUTION TO THE SURFACE OF THE BODY TO RENDER THE SUBMICROSCOPIC CRACKS VISIBLE TO THE EYE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-09 | 1960-04-09 | 1960-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-09 | 1964-04-09 | 1964-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-09 | 1968-04-09 | 1968-10-09 | $7700.00 | Window Closed / Lapsed |