US2437640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Strip of severable reinforcing tabs for loose-leaf sheets
Assignee: Individual
•
Filing: 1944-11-17
•
Granted: 1948-03-09
•
Expires: 1964-11-17
Abstract
No abstract record available.
Inventors
- 👤 Sr Charles E Hedrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:32
CPC Classifications
B; B42; B42F; B42F3/00; B42F3/003; B42F3/006; Y; Y10; Y10S; Y10S206/00; Y10S206/82; Y10S24/00; Y10S24/11; Y10T; Y10T24/00; Y10T24/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US919620A
Cited
US943653A
Cited
US1066543A
Cited
US1769395A
Cited
US1869385A
Cited
US2059148A
Cited
US2272308A
Cited
US2349115A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-09 | 1951-09-08 | 1952-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-09 | 1955-09-08 | 1956-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-09 | 1959-09-08 | 1960-03-09 | $7700.00 | Window Closed / Lapsed |