US3529893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photometer with bridge circuit
Assignee: Ernst Leitz Wetzlar GmbH
•
Filing: 1966-06-22
•
Granted: 1970-09-22
•
Expires: 1986-06-22
Abstract
No abstract record available.
Inventors
- 👤 Werner A Holle
- 👤 Rudolf Wilhelm Kreiling
- 👤 Hans Dietrich Brueckner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:59
CPC Classifications
G; G01; G01J; G01J1/00; G01J1/42; G01J1/44; G01J1/10; G01J1/16; G01J1/1626; G01J1/4209; G01J1/4214
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2233879A
Cited
US2848684A
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US2972282A
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DE1169154B
Cited
US3218917A
Cited
US3225646A
Cited
US3247387A
Cited
US3286097A
Cited
US3379094A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-21 | 1974-03-23 | 1974-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-21 | 1978-03-23 | 1978-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-21 | 1982-03-23 | 1982-09-22 | $7700.00 | Window Closed / Lapsed |