Patent US3437411A successfully refreshed from Google Patents.
US3437411A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical null spectrophotometer
Assignee: Optical Coating Laboratory Inc
•
Filing: 1964-11-24
•
Granted: 1969-04-08
•
Expires: 1984-11-24
Abstract
No abstract record available.
Inventors
- 👤 Andrew C Rudomanski
- 👤 Eugene A Eufusia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:46
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/12; G01J3/28; G01J3/42
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2269674A
Cited
US2439373A
Cited
US2605671A
Cited
US2631489A
Cited
US3039353A
Cited
US3016800A
Cited
US3071037A
Cited
US3062088A
Cited
FR1314569A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |