US2291789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet trimming, slitting, and scoring mechanism
Assignee: Samuel M Langston Co
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Filing: 1941-02-24
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Granted: 1942-08-04
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Expires: 1961-02-24
Abstract
No abstract record available.
Inventors
- 👤 Herbert C Behrens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:15
CPC Classifications
B; B23; B23D; B23D35/00; B23D35/008; Y; Y10; Y10T; Y10T83/00; Y10T83/768; Y10T83/7738; Y10T83/7793; Y10T83/7797; Y10T83/808; Y10T83/869; Y10T83/8727
Claims Analysis
Total Claims: 0
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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) | 1945-08-03 | 1946-02-02 | 1946-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-08-03 | 1950-02-02 | 1950-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-08-03 | 1954-02-02 | 1954-08-04 | $7700.00 | Window Closed / Lapsed |