Patent US2157414A successfully refreshed from Google Patents.
Patent US3535777A successfully refreshed from Google Patents.
US3535777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disk assembly and method of fabricating same
Assignee: Scientific Data Systems Inc
•
Filing: 1968-02-23
•
Granted: 1970-10-27
•
Expires: 1988-02-23
Abstract
No abstract record available.
Inventors
- 👤 John Alexander Felts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:11
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/4806; G11B17/00; G11B17/02; G11B17/022; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49004; Y10T29/4902; Y10T29/49069; Y10T29/49826; Y10T29/49895; Y10T29/49902; Y10T29/53; Y10T29/5313; Y10T29/53165; Y10T29/53978
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3126776A
Cited
US2314762A
Cited
US3006443A
Cited
US3077030A
Cited
US3326726A
Cited
US3298091A
Cited
US3380149A
Cited
US3372455A
Cited
US3426419A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-26 | 1974-04-27 | 1974-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-26 | 1978-04-27 | 1978-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-26 | 1982-04-27 | 1982-10-27 | $7700.00 | Window Closed / Lapsed |