US2540033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time and production recording apparatus
Assignee: International Business Machines Corp
•
Filing: 1947-02-21
•
Granted: 1951-01-30
•
Expires: 1967-02-21
Abstract
No abstract record available.
Inventors
- 👤 Leathers Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:02
CPC Classifications
G; G07; G07C; G07C3/00; G07C3/02; G07C3/04; G07C3/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1253696A
Cited
US1263571A
Cited
US1284430A
Cited
US1329062A
Cited
US2307958A
Cited
US2283993A
Cited
US2440665A
Cited
US2344497A
Cited
US2396869A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-29 | 1954-07-31 | 1955-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-29 | 1958-07-31 | 1959-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-29 | 1962-07-31 | 1963-01-30 | $7700.00 | Window Closed / Lapsed |