Patent US3523740A successfully refreshed from Google Patents.
US3523740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit for measuring light flux of flashes of light
Assignee: P Gossen and Co GmbH
•
Filing: 1968-07-24
•
Granted: 1970-08-11
•
Expires: 1988-07-24
Abstract
No abstract record available.
Inventors
- 👤 Helmut Peter
- 👤 Gerhard Schmidt
- 👤 Karl-Heinz Wirth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:56
CPC Classifications
G; G01; G01J; G01J1/00; G01J1/42; G01J1/44; G01J1/46
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-10 | 1974-02-09 | 1974-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-10 | 1978-02-09 | 1978-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-10 | 1982-02-09 | 1982-08-11 | $7700.00 | Window Closed / Lapsed |