Patent US2238238A successfully refreshed from Google Patents.
Patent US2850571A successfully refreshed from Google Patents.
US2850571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic store for telephone meter impulses
Assignee: International Standard Electric Corp
•
Filing: 1953-09-10
•
Granted: 1958-09-02
•
Expires: 1973-09-10
Abstract
No abstract record available.
Inventors
- 👤 Bray Frederick Harry
- 👤 King Peter Morris
- 👤 Rice Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:23
CPC Classifications
H; H04; H04M; H04M15/00; H04M15/04; H04B; H04B11/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2165924A
Cited
US2165925A
Cited
US2297365A
Cited
US2513112A
Cited
US2540654A
Cited
US2652554A
Cited
US2549071A
Cited
US2680239A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-01 | 1962-03-03 | 1962-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-01 | 1966-03-03 | 1966-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-01 | 1970-03-03 | 1970-09-02 | $7700.00 | Window Closed / Lapsed |