Patent CH307257A successfully refreshed from Google Patents.
US2730004A
Expired / Lapsed
US
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Microilluminator for spectrometers
Assignee: California Institute Research Foundation
•
Filing: 1951-09-17
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Granted: 1956-01-10
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Expires: 1971-09-17
Abstract
No abstract record available.
Inventors
- 👤 Richard M Badger
- 👤 Newman Roger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:41
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/02; G01J3/10; G01J3/108
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1016369A
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US1179441A
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US1653694A
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US1776712A
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GB350968A
Cited
US1978096A
Cited
US2254062A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-09 | 1959-07-11 | 1960-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-09 | 1963-07-11 | 1964-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-09 | 1967-07-11 | 1968-01-10 | $7700.00 | Window Closed / Lapsed |