US2531775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Attachment for flexible rotary disks
Assignee: Individual
•
Filing: 1949-02-07
•
Granted: 1950-11-28
•
Expires: 1969-02-07
Abstract
No abstract record available.
Inventors
- 👤 Stanley M Kenerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:48
CPC Classifications
B; B24; B24B; B24B45/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE576594C
Cited
US1176001A
Cited
US1587843A
Cited
US1693163A
Cited
US1749709A
Cited
US2359608A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-27 | 1954-05-29 | 1954-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-27 | 1958-05-29 | 1958-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-27 | 1962-05-29 | 1962-11-28 | $7700.00 | Window Closed / Lapsed |