US2431050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of heat sealing laminated materials
Assignee: Individual
•
Filing: 1943-07-12
•
Granted: 1947-11-18
•
Expires: 1963-07-12
Abstract
No abstract record available.
Inventors
- 👤 Karl J Kopplin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:39
CPC Classifications
B; B32; B32B; B32B27/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1343191A
Cited
US1211487A
Cited
US1243654A
Cited
US1475623A
Cited
US1377517A
Cited
US1370666A
Cited
US1610910A
Cited
US1589841A
Cited
US1656874A
Cited
US1793054A
Cited
US1845133A
Cited
US1880785A
Cited
GB401276A
Cited
GB480880A
Cited
US2202042A
Cited
US2333143A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-17 | 1951-05-19 | 1951-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-17 | 1955-05-19 | 1955-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-17 | 1959-05-19 | 1959-11-18 | $7700.00 | Window Closed / Lapsed |