US2499658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Facing tool
Assignee: Individual
•
Filing: 1946-03-18
•
Granted: 1950-03-07
•
Expires: 1966-03-18
Abstract
No abstract record available.
Inventors
- 👤 Francis G Livingston
- 👤 Charles L Livingston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:38
CPC Classifications
B; B23; B23B; B23B5/00; B23B5/16; B23B5/161; B23B5/163; Y; Y10; Y10T; Y10T408/00; Y10T408/55; Y10T408/557; Y10T408/558; Y10T408/5587; Y10T408/561; Y10T408/5626; Y10T408/5627; Y10T408/56275; Y10T408/563; Y10T408/5633
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US378196A
Cited
US466723A
Cited
DE549906C
Cited
US1414480A
Cited
US1534908A
Cited
US1905819A
Cited
US2211183A
Cited
US2416228A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-06 | 1953-09-05 | 1954-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-06 | 1957-09-05 | 1958-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-06 | 1961-09-05 | 1962-03-07 | $7700.00 | Window Closed / Lapsed |