US210959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in metallic postal envelopes
Assignee: —
•
Filing: —
•
Granted: 1878-12-17
•
Expires: 1895-12-17
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:02
CPC Classifications
B; B65; B65D; B65D39/00; B65D39/08; B65D39/082; B65D39/084; F; F01; F01P; F01P11/00; F01P11/02; F01P11/0204; F01P11/0209; F01P11/0214; Y; Y10; Y10T; Y10T292/00; Y10T292/42
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) | 1881-12-16 | 1882-06-17 | 1882-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1885-12-16 | 1886-06-17 | 1886-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1889-12-16 | 1890-06-17 | 1890-12-17 | $7700.00 | Window Closed / Lapsed |