US2898802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectric colorimeter
Assignee: Individual
•
Filing: 1956-01-24
•
Granted: 1959-08-11
•
Expires: 1976-01-24
Abstract
No abstract record available.
Inventors
- 👤 Ljungberg Lars Rune
- 👤 Ohlin Lars Erik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:16
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/251; G01J; G01J3/00; G01J3/46; G01J3/50; G01J3/51
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB381696A
Cited
US2233879A
Cited
US2265357A
Cited
GB594497A
Cited
US2483876A
Cited
US2677303A
Cited
US2761072A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |