US2996959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for perforating paper and the like
Assignee: Individual
•
Filing: 1957-10-08
•
Granted: 1961-08-22
•
Expires: 1977-10-08
Abstract
No abstract record available.
Inventors
- 👤 Hellberg Gustav Sigvald
- 👤 Alfredeen Uno Allan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:27
CPC Classifications
G; G06; G06K; G06K19/00; G06K19/02; G06K19/022; B; B26; B26F; B26F1/00; B26F1/02; B26F1/06; B26F1/10; B26F1/16; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/304536; Y10T409/305208; Y10T409/30868; Y10T409/309016; Y10T409/309072; Y10T83/00; Y10T83/465; Y10T83/4699
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |