US2532494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making paper tubes
Assignee: McGraw Electric Co
•
Filing: 1946-11-23
•
Granted: 1950-12-05
•
Expires: 1966-11-23
Abstract
No abstract record available.
Inventors
- 👤 Elmer G Hensler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:55
CPC Classifications
B; B31; B31C; B31C1/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US539777A
Cited
US932802A
Cited
US1040438A
Cited
US1040437A
Cited
US1147262A
Cited
US1234701A
Cited
US1730629A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-04 | 1954-06-05 | 1954-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-04 | 1958-06-05 | 1958-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-04 | 1962-06-05 | 1962-12-05 | $7700.00 | Window Closed / Lapsed |