US2367657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Attaching device
Assignee: Duffy Manufacturing Co
•
Filing: 1943-09-13
•
Granted: 1945-01-23
•
Expires: 1963-09-13
Abstract
No abstract record available.
Inventors
- 👤 Reemer A Boersma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:56
CPC Classifications
F; F16; F16B; F16B21/00; F16B21/06; F16B21/07; F16B21/073; B; B60; B60R; B60R3/00; B60R3/002; Y; Y10; Y10T; Y10T24/00; Y10T24/42; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/4987; Y10T29/49876
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) | 1948-01-23 | 1948-07-24 | 1949-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-01-23 | 1952-07-24 | 1953-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-01-23 | 1956-07-24 | 1957-01-23 | $7700.00 | Window Closed / Lapsed |