US2434863A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Caster
Assignee: WALTER E LUDWIG
•
Filing: 1943-07-30
•
Granted: 1948-01-20
•
Expires: 1963-07-30
Abstract
No abstract record available.
Inventors
- 👤 Frederic W Parkhill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:04
CPC Classifications
B; B60; B60B; B60B33/00; B60B33/0002; B60B33/02; B60B33/021; Y; Y10; Y10T; Y10T279/00; Y10T279/10; Y10T279/1004; Y10T279/1008; Y10T279/1037; Y10T279/1041; Y10T279/1045
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US570786A
Cited
US945403A
Cited
US1138345A
Cited
US1671774A
Cited
US1863349A
Cited
US1922099A
Cited
US1953636A
Cited
US1927271A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-01-19 | 1951-07-21 | 1952-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-01-19 | 1955-07-21 | 1956-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-01-19 | 1959-07-21 | 1960-01-20 | $7700.00 | Window Closed / Lapsed |