Patent US1153163A successfully refreshed from Google Patents.
US2135028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording device
Assignee: RCA Corp
•
Filing: 1936-08-29
•
Granted: 1938-11-01
•
Expires: 1956-08-29
Abstract
No abstract record available.
Inventors
- 👤 Samuel A Bokovoy
- 👤 Paul D Gerber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:47
CPC Classifications
G; G01; G01D; G01D9/00; G01D9/02; G01D9/10; G01D9/16
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1941-10-31 | 1942-05-02 | 1942-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-10-31 | 1946-05-02 | 1946-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-10-31 | 1950-05-02 | 1950-11-01 | $7700.00 | Window Closed / Lapsed |