Patent US2554864A successfully refreshed from Google Patents.
US2554864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polarizer for rifle tube sights
Assignee: Individual
•
Filing: 1949-01-21
•
Granted: 1951-05-29
•
Expires: 1969-01-21
Abstract
No abstract record available.
Inventors
- 👤 Ray V Lloyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:08
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/28; G02B27/281
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US433323A
Cited
US1307912A
Cited
US2242317A
Cited
US1476340A
Cited
US1774053A
Cited
US2155436A
Cited
US2408772A
Cited
US2399658A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-28 | 1954-11-27 | 1955-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-28 | 1958-11-27 | 1959-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-28 | 1962-11-27 | 1963-05-29 | $7700.00 | Window Closed / Lapsed |