US2530397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anastigmatic lens
Assignee: Individual
•
Filing: 1948-02-18
•
Granted: 1950-11-21
•
Expires: 1968-02-18
Abstract
No abstract record available.
Inventors
- 👤 Ancillary Henry L Beigel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:52
CPC Classifications
G; G02; G02B; G02B3/00; G02B3/02; G02B3/04; G02B13/00; G02B13/18
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US697959A
Cited
US934579A
Cited
US949501A
Cited
US968693A
Cited
US1507212A
Cited
US1968222A
Cited
DE616565C
Cited
GB530506A
Cited
US2284567A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-20 | 1954-05-22 | 1954-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-20 | 1958-05-22 | 1958-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-20 | 1962-05-22 | 1962-11-21 | $7700.00 | Window Closed / Lapsed |