US3421710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unwinding apparatus
Assignee: Rio Tinto Switzerland AG
•
Filing: 1966-09-27
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Granted: 1969-01-14
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Expires: 1986-09-27
Abstract
No abstract record available.
Inventors
- 👤 Gerhard Mier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:06
CPC Classifications
B; B21; B21C; B21C47/00; B21C47/34; B21C47/003; B65; B65H; B65H23/00; B65H23/04; B65H23/06; B65H23/063; B65H59/00; B65H59/02; B65H59/04
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) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |