US3540019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single wall domain device
Assignee: AT&T Inc
•
Filing: 1968-03-04
•
Granted: 1970-11-10
•
Expires: 1988-03-04
Abstract
No abstract record available.
Inventors
- 👤 Andrew H Bobeck
- 👤 Robert F Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:20
CPC Classifications
G; G11; G11C; G11C19/00; G11C19/02; G11C19/08; G11C19/0808; G11C19/0841; G11C19/0825; G11C19/0875; G11C19/0883
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3438016A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |