US2922331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spectroscopic device
Assignee: Individual
•
Filing: 1953-03-24
•
Granted: 1960-01-26
•
Expires: 1973-03-24
Abstract
No abstract record available.
Inventors
- 👤 William G Fastie
- 👤 William M Sinton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:54
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/12; G01J3/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1727173A
Cited
US2314800A
Cited
US2453164A
Cited
US2594334A
Cited
US2638811A
Cited
US2652742A
Cited
US2749793A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-25 | 1963-07-27 | 1964-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-25 | 1967-07-27 | 1968-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-25 | 1971-07-27 | 1972-01-26 | $7700.00 | Window Closed / Lapsed |