US2548004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separable fastener
Assignee: Individual
•
Filing: 1944-02-02
•
Granted: 1951-04-10
•
Expires: 1964-02-02
Abstract
No abstract record available.
Inventors
- 👤 Duefrene George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:07
CPC Classifications
A; A44; A44B; A44B17/00; A44B17/0029; Y; Y10; Y10S; Y10S24/00; Y10S24/17; Y10T; Y10T24/00; Y10T24/45; Y10T24/45225; Y10T24/45602; Y10T24/45775; Y10T24/4588; Y10T24/45937
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190522848A
Cited
US1541936A
Cited
US1773422A
Cited
US1682771A
Cited
DE600997C
Cited
US2111664A
Cited
US2179032A
Cited
US2210799A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-09 | 1954-10-09 | 1955-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-09 | 1958-10-09 | 1959-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-09 | 1962-10-09 | 1963-04-10 | $7700.00 | Window Closed / Lapsed |