Patent US2620830A successfully refreshed from Google Patents.
US2620830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-sealing tube insert
Assignee: Individual
•
Filing: 1950-02-18
•
Granted: 1952-12-09
•
Expires: 1970-02-18
Abstract
No abstract record available.
Inventors
- 👤 Schultz Herman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:09
CPC Classifications
F; F28; F28F; F28F11/00; F28F11/02; F28F19/00; F28F19/002; Y; Y10; Y10T; Y10T403/00; Y10T403/45; Y10T403/455
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2157107A
Cited
US2195403A
Cited
US2225615A
Cited
US2428932A
Cited
US2517778A
Cited
US2445273A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |