US2423778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Journal structure
Assignee: Individual
•
Filing: 1943-05-05
•
Granted: 1947-07-08
•
Expires: 1963-05-05
Abstract
No abstract record available.
Inventors
- 👤 Johnstone Robert Mcc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:16
CPC Classifications
F; F16; F16C; F16C13/00; F16C13/02; F16C13/04; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18024
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US244849A
Cited
US304512A
Cited
US566166A
Cited
US718955A
Cited
US742905A
Cited
US1523328A
Cited
GB239205A
Cited
CH166292A
Cited
US2031761A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-07-07 | 1951-01-06 | 1951-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-07 | 1955-01-06 | 1955-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-07 | 1959-01-06 | 1959-07-08 | $7700.00 | Window Closed / Lapsed |