Patent US2503165A successfully refreshed from Google Patents.
US2503165A
Expired / Lapsed
US
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Photometric apparatus for quantitative spectroanalysis
Assignee: Individual
•
Filing: 1945-04-17
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Granted: 1950-04-04
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Expires: 1965-04-17
Abstract
No abstract record available.
Inventors
- 👤 Meyer Robert Vance
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:10
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/28; G01J3/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1816047A
Cited
US1806199A
Cited
US1746525A
Cited
US1919182A
Cited
US1999023A
Cited
US2251613A
Cited
US2383075A
Cited
US2417023A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-03 | 1953-10-03 | 1954-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-03 | 1957-10-03 | 1958-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-03 | 1961-10-03 | 1962-04-04 | $7700.00 | Window Closed / Lapsed |