US2238058A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansible cover
Assignee: National Standard Co
•
Filing: 1940-05-22
•
Granted: 1941-04-15
•
Expires: 1960-05-22
Abstract
No abstract record available.
Inventors
- 👤 Charles R Johnson
- 👤 Robert C Pierce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:03
CPC Classifications
B; B21; B21F; B21F27/00; B21F27/005; D; D04; D04C; D04C1/00; D04C1/06; E; E21; E21C; E21C37/00; E21C37/06; E21C37/10
Claims Analysis
Total Claims: 0
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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) | 1944-04-14 | 1944-10-14 | 1945-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-04-14 | 1948-10-14 | 1949-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-04-14 | 1952-10-14 | 1953-04-15 | $7700.00 | Window Closed / Lapsed |