US2563127A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selector calling system
Assignee: S STEPHEN BAKER
•
Filing: 1948-04-21
•
Granted: 1951-08-07
•
Expires: 1968-04-21
Abstract
No abstract record available.
Inventors
- 👤 Mcgoffin William Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:01
CPC Classifications
H; H04; H04W; H04W88/00; H04W88/02; H04W88/022; H04W88/025; H04W88/028
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1882010A
Cited
US2074392A
Cited
US2411091A
Cited
US2425820A
Cited
US2452052A
Cited
US2480624A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-06 | 1955-02-05 | 1955-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-06 | 1959-02-05 | 1959-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-06 | 1963-02-05 | 1963-08-07 | $7700.00 | Window Closed / Lapsed |