Patent US2833476A successfully refreshed from Google Patents.
Patent US1385696A successfully refreshed from Google Patents.
US1385696A
Expired / Lapsed
US
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Method and apparatus for utilization of observable radiations
Assignee: Individual
•
Filing: 1919-02-01
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Granted: 1921-07-26
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Expires: 1939-02-01
Abstract
No abstract record available.
Inventors
- 👤 Marshall Norman
- 👤 Bell Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:09
CPC Classifications
G; G02; G02B; G02B23/00; G02B23/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1924-07-25 | 1925-01-24 | 1925-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-07-25 | 1929-01-24 | 1929-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-07-25 | 1933-01-24 | 1933-07-26 | $7700.00 | Window Closed / Lapsed |