US2589130A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permutation code group selector
Assignee: AT&T Inc
•
Filing: 1949-06-24
•
Granted: 1952-03-11
•
Expires: 1969-06-24
Abstract
No abstract record available.
Inventors
- 👤 Ralph K Potter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:59
CPC Classifications
H; H04; H04W; H04W88/00; H04W88/02; H04W88/022; H04W88/025; H04W88/028
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1287396A
Cited
US1932084A
Cited
US2130166A
Cited
US2237671A
Cited
US2396211A
Cited
US2403561A
Cited
US2415359A
Cited
US2487781A
Cited
US2522609A
Cited
US2438825A
Cited
US2437266A
Cited
US2442702A
Cited
US2495452A
Cited
US2480115A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-11 | 1955-09-10 | 1956-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-11 | 1959-09-10 | 1960-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-11 | 1963-09-10 | 1964-03-11 | $7700.00 | Window Closed / Lapsed |