US2443791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for marking letters and the like
Assignee: JOHN W SLACK
•
Filing: 1946-04-24
•
Granted: 1948-06-22
•
Expires: 1966-04-24
Abstract
No abstract record available.
Inventors
- 👤 Ielfield August
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:36
CPC Classifications
B; B41; B41K; B41K3/00; B41K3/02; B41K3/12; Y; Y10; Y10S; Y10S101/00; Y10S101/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1703148A
Cited
US408401A
Cited
US1042759A
Cited
US1038587A
Cited
US1087121A
Cited
US1103147A
Cited
US1243740A
Cited
US1202848A
Cited
US1351175A
Cited
US1274847A
Cited
US1349940A
Cited
US1974987A
Cited
US2130897A
Cited
US2256514A
Cited
US2412132A
Cited
US2358401A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-22 | 1951-12-22 | 1952-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-22 | 1955-12-22 | 1956-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-22 | 1959-12-22 | 1960-06-22 | $7700.00 | Window Closed / Lapsed |