US2995975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectric exposure meter
Assignee: General Electric Co
•
Filing: 1957-11-29
•
Granted: 1961-08-15
•
Expires: 1977-11-29
Abstract
No abstract record available.
Inventors
- 👤 Charles A Balchunas
- 👤 Jr William J Mccune
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:10
CPC Classifications
G; G01; G01J; G01J1/00; G01J1/42; G01J1/4209; G01J1/4214
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2129114A
Cited
DE691440C
Cited
US2297262A
Cited
US2274441A
Cited
US2584440A
Cited
US2590165A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-14 | 1965-02-13 | 1965-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-14 | 1969-02-13 | 1969-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-14 | 1973-02-13 | 1973-08-15 | $7700.00 | Window Closed / Lapsed |