US3057248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispersion prism with no deviation
Assignee: Barnes Engineering Co
•
Filing: 1961-04-13
•
Granted: 1962-10-09
•
Expires: 1981-04-13
Abstract
No abstract record available.
Inventors
- 👤 Sherman Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:53
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/04; G01; G01J; G01J3/00; G01J3/12; G01J3/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-08 | 1966-04-09 | 1966-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-08 | 1970-04-09 | 1970-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-08 | 1974-04-09 | 1974-10-09 | $7700.00 | Window Closed / Lapsed |