Patent US3521600A successfully refreshed from Google Patents.
US3521600A
Expired / Lapsed
US
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Automatic measurement and control of weight uniformity of traveling sheet material
Assignee: Individual
•
Filing: 1968-03-14
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Granted: 1970-07-21
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Expires: 1988-03-14
Abstract
No abstract record available.
Inventors
- 👤 Kazuo Toya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:01
CPC Classifications
G; G01; G01G; G01G17/00; G01G17/02
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) | 1973-07-20 | 1974-01-19 | 1974-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-20 | 1978-01-19 | 1978-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-20 | 1982-01-19 | 1982-07-21 | $7700.00 | Window Closed / Lapsed |