Patent US3521237A successfully refreshed from Google Patents.
US3521237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-speed data-directed information processing system
Assignee: AT&T Inc
•
Filing: 1967-05-11
•
Granted: 1970-07-21
•
Expires: 1987-05-11
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Chinlund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:00
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/32; G; G06; G06F; G06F9/00; G06F9/06; G06F9/44; G06F9/448; G06F9/4482; G06F9/4484
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3061192A
Cited
US3234523A
Cited
US3239820A
Cited
US3241125A
Cited
US3268872A
Cited
US3287703A
Cited
US3297997A
Cited
US3331056A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-20 | 1974-01-19 | 1974-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-20 | 1978-01-19 | 1978-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-20 | 1982-01-19 | 1982-07-21 | $7700.00 | Window Closed / Lapsed |