US2643429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separable fastener
Assignee: HARRY C KERN
•
Filing: 1951-10-24
•
Granted: 1953-06-30
•
Expires: 1971-10-24
Abstract
No abstract record available.
Inventors
- 👤 Wittstock Alfred Gustave
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:30
CPC Classifications
A; A44; A44B; A44B1/00; A44B1/18; A44B1/28; A44B1/32; Y; Y10; Y10T; Y10T24/00; Y10T24/46; Y10T24/4604; Y10T24/4605; Y10T24/4609; Y10T24/4618; Y10T24/4621; Y10T24/4627
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US108155A
Cited
US295583A
Cited
US493559A
Cited
US573059A
Cited
US854073A
Cited
US1484131A
Cited
US1494022A
Cited
US1542325A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |