Patent US154988A successfully refreshed from Google Patents.
US2613237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calculating tables and the like
Assignee: Individual
•
Filing: 1947-08-27
•
Granted: 1952-10-07
•
Expires: 1967-08-27
Abstract
No abstract record available.
Inventors
- 👤 James H Starr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:07
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/48; G06G7/62; G06G7/63
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1287970A
Cited
US1588539A
Cited
US2123142A
Cited
US1954311A
Cited
US2140662A
Cited
US2288310A
Cited
US2318248A
Cited
US2323588A
Cited
US2301470A
Cited
US2371636A
Cited
US2471105A
Cited
US2417820A
Cited
US2475827A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-07 | 1956-04-07 | 1956-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-07 | 1960-04-07 | 1960-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-07 | 1964-04-07 | 1964-10-07 | $7700.00 | Window Closed / Lapsed |