US2470138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tamperproof mailbox
Assignee: Individual
•
Filing: 1947-06-27
•
Granted: 1949-05-17
•
Expires: 1967-06-27
Abstract
No abstract record available.
Inventors
- 👤 Charles B Browning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:26
CPC Classifications
A; A47; A47G; A47G29/00; A47G29/12; A47G29/122; A47G29/124
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE256581C
Cited
US298733A
Cited
US448500A
Cited
US468594A
Cited
US535317A
Cited
US573220A
Cited
US1732939A
Cited
US879094A
Cited
US1297227A
Cited
US1496419A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-16 | 1952-11-15 | 1953-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-16 | 1956-11-15 | 1957-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-16 | 1960-11-15 | 1961-05-17 | $7700.00 | Window Closed / Lapsed |