Patent US2928221A successfully refreshed from Google Patents.
US2928221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Packaging machine
Assignee: ETHEL MARGARET SMITH
•
Filing: 1955-11-08
•
Granted: 1960-03-15
•
Expires: 1975-11-08
Abstract
No abstract record available.
Inventors
- 👤 Henry R Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:56
CPC Classifications
B; B65; B65B; B65B9/00; B65B9/02; B65B9/04; B29; B29C; B29C51/00; B29C51/18; B29C51/20; B29C51/24
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1481866A
Cited
DE461794C
Cited
US1970396A
Cited
US2530306A
Cited
US2546059A
Cited
US2624164A
Cited
US2736150A
Cited
US2697317A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |