Patent US2394546A successfully refreshed from Google Patents.
Patent US2552789A successfully refreshed from Google Patents.
US2552789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Key-responsive cycle initiating
Assignee: —
•
Filing: —
•
Granted: 1951-05-15
•
Expires: 1968-05-15
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:11
CPC Classifications
G; G06; G06C; G06C21/00; G06C21/04; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20207; Y10T74/20238; Y10T74/20244
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1849169A
Cited
US2117620A
Cited
US2152199A
Cited
US2229553A
Cited
US2396188A
Cited
US1514954A
Cited
US1136725A
Cited
US1808213A
Cited
US1877802A
Cited
US2121683A
Cited
US2279455A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-14 | 1954-11-13 | 1955-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-14 | 1958-11-13 | 1959-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-14 | 1962-11-13 | 1963-05-15 | $7700.00 | Window Closed / Lapsed |