US2958802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infrared viewer
Assignee: Individual
•
Filing: 1955-08-23
•
Granted: 1960-11-01
•
Expires: 1975-08-23
Abstract
No abstract record available.
Inventors
- 👤 Louise B Hammar
- 👤 Charles F Gramm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:58
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/02; H04N3/08; H04N3/09
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2451734A
Cited
US1762470A
Cited
US2225097A
Cited
US2028475A
Cited
US2395099A
Cited
US2234328A
Cited
US2422971A
Cited
US2403066A
Cited
US2623183A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |