US2702500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct action magnetic shutter
Assignee: Individual
•
Filing: 1952-03-20
•
Granted: 1955-02-22
•
Expires: 1972-03-20
Abstract
No abstract record available.
Inventors
- 👤 Bell Arthur G De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:56
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US562599A
Cited
US660006A
Cited
US1919115A
Cited
US1913182A
Cited
US1934519A
Cited
US1983898A
Cited
US2105475A
Cited
US2390216A
Cited
US2528510A
Cited
US2572229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-02-21 | 1958-08-23 | 1959-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-21 | 1962-08-23 | 1963-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-21 | 1966-08-23 | 1967-02-22 | $7700.00 | Window Closed / Lapsed |