US3067649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light probe for photographic use
Assignee: Welch Scientific Co
•
Filing: 1959-04-13
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Granted: 1962-12-11
•
Expires: 1979-04-13
Abstract
No abstract record available.
Inventors
- 👤 Eugene B Szymczak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:01
CPC Classifications
G; G01; G01J; G01J1/00; G01J1/42; G01J1/4209; G01J1/4219
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2356238A
Cited
US2424933A
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US2947232A
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US2885926A
Cited
US3002425A
Cited
US2921498A
Cited
US3003388A
Cited
US2995978A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-10 | 1966-06-11 | 1966-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-10 | 1970-06-11 | 1970-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-10 | 1974-06-11 | 1974-12-11 | $7700.00 | Window Closed / Lapsed |