US2765543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reading device
Assignee: CROWELL
•
Filing: 1955-07-22
•
Granted: 1956-10-09
•
Expires: 1975-07-22
Abstract
No abstract record available.
Inventors
- 👤 Robert L Crowell
- 👤 William J Kendall
- 👤 Hahn Steven
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:44
CPC Classifications
G; G09; G09B; G09B17/00; G09B17/04; B; B42; B42D; B42D9/00; B42D9/04; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19642; Y10T74/19698; Y10T74/19702; Y10T74/19805
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US469658A
Cited
US901879A
Cited
US1372360A
Cited
CH99528A
Cited
US1908874A
Cited
US2252726A
Cited
US2547973A
Cited
US2605558A
Cited
US2568577A
Cited
US2739569A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-09 | 1960-04-09 | 1960-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-09 | 1964-04-09 | 1964-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-09 | 1968-04-09 | 1968-10-09 | $7700.00 | Window Closed / Lapsed |