US2472991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical light wedge
Assignee: Individual
•
Filing: 1945-03-05
•
Granted: 1949-06-14
•
Expires: 1965-03-05
Abstract
No abstract record available.
Inventors
- 👤 Thomas W Sukumlyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:17
CPC Classifications
G; G02; G02B; G02B5/00; G01; G01J; G01J9/00; G01J9/02; G01J9/0246
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2341827A
Cited
US400140A
Cited
US818966A
Cited
US1081031A
Cited
US1919561A
Cited
US1901632A
Cited
GB378429A
Cited
US2103538A
Cited
US2160981A
Cited
US2239452A
Cited
US2220860A
Cited
US2206169A
Cited
US2220861A
Cited
US2281474A
Cited
US2274444A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-13 | 1952-12-13 | 1953-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-13 | 1956-12-13 | 1957-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-13 | 1960-12-13 | 1961-06-14 | $7700.00 | Window Closed / Lapsed |