US2420832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reel end alarm
Assignee: Individual
•
Filing: 1943-07-28
•
Granted: 1947-05-20
•
Expires: 1963-07-28
Abstract
No abstract record available.
Inventors
- 👤 Irving I Merkur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:09
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/32; G03B21/321
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US599988A
Cited
US1323863A
Cited
US1346358A
Cited
US1272671A
Cited
US1275995A
Cited
US1628250A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-19 | 1950-11-18 | 1951-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-19 | 1954-11-18 | 1955-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-19 | 1958-11-18 | 1959-05-20 | $7700.00 | Window Closed / Lapsed |