US3279307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spectrum examination of substances
Assignee: Barnes Engineering Co
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Filing: 1963-01-21
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Granted: 1966-10-18
•
Expires: 1983-01-21
Abstract
No abstract record available.
Inventors
- 👤 Jr Paul A Wilks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:19
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/55; G01N21/552
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A METHOD OF SPECTRUM EXAMINATION OF MATERIALS COMPRISING THE STEPS OF (A) PLACING A SAMPLE TO BE EXAMINED ON A COATING OF ABSORBENT MATERIAL ON THE OPTICALLY FLAT SIDE OF A PLATE TRANSPARENT IN THE SPECTRAL RANGE OF INTEREST WHICH HAS AN UNDULATING SURFACE ON THE OTHER SIDE THEREOF, (B) IMMERSING AN EDGE OF SAID PLATE IN A FLUID THAT MOVES ALONG THE COATED SIDE OF SAID PLATE BY CAPILLARY ACTION, THEREBY SEPARATING THE SAMPLE INTO SEPARATE BAND-LIKE AREAS,
Claim 2
Independent Claim
79 words
A METHOD OF SPECTRUM EXAMINATION OF MATERIALS COMPRISING THE STEPS OF (A) PLACING A SAMPLE TO BE EXAMINED ON A COATING OF ABSORBENT MATERIAL ON THE OPTICALLY FLAT SIDE OF A PLATE TRANSPARENT IN THE SPECTRAL RANGE OF INTEREST WHICH HAS AN UNDULATING SURFACE ON THE OTHER SIDE THEREOF, (B) IMMERSING AN EDGE OF SAID PLATE IN A FLUID THAT MOVES ALONG THE COATED SIDE OF SAID PLATE BY CAPILLARY ACTION, THEREBY SEPARATING THE SAMPLE INTO SEPARATE BAND-LIKE AREAS,
References Cited (Backward Citations)
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US2849618A
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US2912895A
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US3189541A
Cited
US3177759A
Cited
US3157788A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |