US3513743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple-head slitting apparatus
Assignee: National Steel Corp
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Filing: 1967-08-21
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Granted: 1970-05-26
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Expires: 1987-08-21
Abstract
No abstract record available.
Inventors
- 👤 David M Montguire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:39
CPC Classifications
B; B23; B23D; B23D35/00; B23D35/008; Y; Y10; Y10T; Y10T83/00; Y10T83/647; Y10T83/6584; Y10T83/6603; Y10T83/768; Y10T83/7738; Y10T83/7809; Y10T83/783; Y10T83/869; Y10T83/8727; Y10T83/8732
Claims Analysis
Total Claims: 0
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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) | 1973-05-25 | 1973-11-24 | 1974-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-25 | 1977-11-24 | 1978-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-25 | 1981-11-24 | 1982-05-26 | $7700.00 | Window Closed / Lapsed |