US3088808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame photometry
Assignee: Pennwalt Corp
•
Filing: 1957-10-28
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Granted: 1963-05-07
•
Expires: 1977-10-28
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry Creston Mandell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:25
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/62; G01N21/71; G01N21/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A METHOD FOR THE QUANTITATIVE DETERMINATION IN A MATERIAL OF THE CONTENT OF A METAL ELEMENT FORMING A REFRACTORY METAL OXIDE AND SELECTED FROM THE GROUP CONSISTING OF AL, BA, CA, CR, CU, FE, MG AND SR WHICH COMPRISES EXCITING SAID MATERIAL IN A FLAME PHOTOMETER BY MEANS OF A FLAME DERIVED FROM A FRAME SOURCE CONSISTING ESSENTIALLY OF PERCHLORYL FLUORIDE AND A FLUID SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, NATURAL GAS, MANUFAC-
Claim 2
Independent Claim
74 words
A METHOD FOR THE QUANTITATIVE DETERMINATION IN A MATERIAL OF THE CONTENT OF A METAL ELEMENT FORMING A REFRACTORY METAL OXIDE AND SELECTED FROM THE GROUP CONSISTING OF AL, BA, CA, CR, CU, FE, MG AND SR WHICH COMPRISES EXCITING SAID MATERIAL IN A FLAME PHOTOMETER BY MEANS OF A FLAME DERIVED FROM A FRAME SOURCE CONSISTING ESSENTIALLY OF PERCHLORYL FLUORIDE AND A FLUID SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, NATURAL GAS, MANUFAC-
References Cited (Backward Citations)
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US2585901A
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US2811891A
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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) | 1966-05-06 | 1966-11-05 | 1967-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-06 | 1970-11-05 | 1971-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-06 | 1974-11-05 | 1975-05-07 | $7700.00 | Window Closed / Lapsed |