US2255019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making index strips
Assignee: Unisys Corp
•
Filing: 1938-02-05
•
Granted: 1941-09-02
•
Expires: 1958-02-05
Abstract
No abstract record available.
Inventors
- 👤 Carl F Wolters
- 👤 Robert M Ellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:23
CPC Classifications
B; B27; B27D; B27D1/00; B27D1/04; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1082
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-09-01 | 1945-03-03 | 1945-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-09-01 | 1949-03-03 | 1949-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-09-01 | 1953-03-03 | 1953-09-02 | $7700.00 | Window Closed / Lapsed |