US2929294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pendulum type spectrograph
Assignee: Individual
•
Filing: 1956-09-07
•
Granted: 1960-03-22
•
Expires: 1976-09-07
Abstract
No abstract record available.
Inventors
- 👤 Kardas Raymond Stanley
- 👤 Routsis Kostas
- 👤 Arthur G Chartier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:01
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/28; G01J3/2889
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE365633C
Cited
US818534A
Cited
DE638844C
Cited
US2221170A
Cited
US2597001A
Cited
US2559688A
Cited
US2706928A
Cited
US2723589A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |