US2916963A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for testing light discrimination
Assignee: Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO
•
Filing: 1955-03-31
•
Granted: 1959-12-15
•
Expires: 1975-03-31
Abstract
No abstract record available.
Inventors
- 👤 Maarten A Bouman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:19
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/02; A61B3/06; A61B3/066
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB189819087A
Cited
US643184A
Cited
US1564495A
Cited
US1494548A
Cited
US1795752A
Cited
DE690378C
Cited
US2453335A
Cited
US2501446A
Cited
US2674153A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-14 | 1963-06-15 | 1963-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-14 | 1967-06-15 | 1967-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-14 | 1971-06-15 | 1971-12-15 | $7700.00 | Window Closed / Lapsed |