US3520220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slitting machine
Assignee: ERIC O ACKER
•
Filing: 1967-12-18
•
Granted: 1970-07-14
•
Expires: 1987-12-18
Abstract
No abstract record available.
Inventors
- 👤 Eric O Acker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:35
CPC Classifications
C; C14; C14B; C14B5/00; C14B2700/00; C14B2700/11; Y; Y10; Y10T; Y10T83/00; Y10T83/869; Y10T83/8696; Y10T83/8699; Y10T83/8776; Y10T83/8785; Y10T83/8798; Y10T83/8799; Y10T83/8801; Y10T83/8821; Y10T83/8828; Y10T83/8831; Y10T83/929; Y10T83/9314; Y10T83/9411; Y10T83/9449
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US92600A
Cited
US1164240A
Cited
US1152577A
Cited
US1965462A
Cited
US2217763A
Cited
US2243623A
Cited
US2235948A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-13 | 1974-01-12 | 1974-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-13 | 1978-01-12 | 1978-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-13 | 1982-01-12 | 1982-07-14 | $7700.00 | Window Closed / Lapsed |