US2494905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for heat sealing
Assignee: Individual
•
Filing: 1946-09-11
•
Granted: 1950-01-17
•
Expires: 1966-09-11
Abstract
No abstract record available.
Inventors
- 👤 Harold F Shumann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:56
CPC Classifications
B; B31; B31B; B31B70/00; B31B70/60; B31B70/64; B31B70/642; B31B2160/00; B31B2160/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US515121A
Cited
US2125306A
Cited
US2125758A
Cited
US2253946A
Cited
US2348196A
Cited
US2249392A
Cited
US2289618A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-16 | 1953-07-18 | 1954-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-16 | 1957-07-18 | 1958-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-16 | 1961-07-18 | 1962-01-17 | $7700.00 | Window Closed / Lapsed |