US3516451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machines for manufacturing spring interiors
Assignee: Spuehl AG
•
Filing: 1967-03-03
•
Granted: 1970-06-23
•
Expires: 1987-03-03
Abstract
No abstract record available.
Inventors
- 👤 Walter Spuhl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:48
CPC Classifications
B; B21; B21F; B21F33/00; B21F33/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1905459A
Cited
US2231744A
Cited
US2262994A
Cited
US2294707A
Cited
US2296878A
Cited
US2470812A
Cited
US2663038A
Cited
US3064693A
Cited
US3045714A
Cited
US3098510A
Cited
US3339593A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-22 | 1973-12-22 | 1974-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-22 | 1977-12-22 | 1978-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-22 | 1981-12-22 | 1982-06-23 | $7700.00 | Window Closed / Lapsed |