Patent JPH06290221A successfully refreshed from Google Patents.
Patent EP0143259A1 successfully refreshed from Google Patents.
US3424533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spectrographic analysis
Assignee: Philips North America LLC
•
Filing: 1963-02-28
•
Granted: 1969-01-28
•
Expires: 1983-02-28
Abstract
No abstract record available.
Inventors
- 👤 Ray C Hughes
- 👤 Radu Mavrodineanu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:26
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/62; G01N21/71; G01N21/73
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1971215A
Cited
US2043053A
Cited
US2670649A
Cited
US2745311A
Cited
US3025745A
Cited
US2708387A
Cited
US3048738A
Cited
US3188180A
Cited
US3242798A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |