US2581049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grooving of index cards
Assignee: John Hancock Life Insurance Co USA
•
Filing: 1949-02-26
•
Granted: 1952-01-01
•
Expires: 1969-02-26
Abstract
No abstract record available.
Inventors
- 👤 Schempers William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:51
CPC Classifications
B; B26; B26D; B26D3/00; B26D3/14; Y; Y10; Y10S; Y10S83/00; Y10S83/917; Y10T; Y10T409/00; Y10T409/30; Y10T409/309184; Y10T83/00; Y10T83/02; Y10T83/0304; Y10T83/647; Y10T83/654; Y10T83/6571
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US228750A
Cited
US234399A
Cited
US254883A
Cited
US1280202A
Cited
US1289432A
Cited
US1289431A
Cited
US1280218A
Cited
US1280275A
Cited
GB339724A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-31 | 1955-07-02 | 1956-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-31 | 1959-07-02 | 1960-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-31 | 1963-07-02 | 1964-01-01 | $7700.00 | Window Closed / Lapsed |