US2934143A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suction flat box cover perforation
Assignee: Beloit Iron Works Inc
•
Filing: 1957-06-17
•
Granted: 1960-04-26
•
Expires: 1977-06-17
Abstract
No abstract record available.
Inventors
- 👤 Hornbostel Lloyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:39
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/48; D21F1/52; D21F1/523
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US790589A
Cited
US1534854A
Cited
US2006519A
Cited
US2487202A
Cited
US2543870A
Cited
US2618206A
Cited
US2712776A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |