Patent US2441940A successfully refreshed from Google Patents.
US2441940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for heat sealing shrinkable films
Assignee: Packaging Industries Inc
•
Filing: 1944-04-20
•
Granted: 1948-05-18
•
Expires: 1964-04-20
Abstract
No abstract record available.
Inventors
- 👤 Howard A Rohdin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:23
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/70; B29C66/73; B29C66/737; B29C66/7371; B29C53/00; B29C53/36; B29C53/38; B29C53/48; B29C53/50; B29C65/00; B29C65/02; B29C65/18; B29C66/004; B29C66/0042; B29C66/0044; B29C66/00441; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C66/431; B29C66/4312; B29C66/43121; B29C66/432; B29C66/4322; B29C66/49; B29C66/73711; B29C66/80; B29C66/82; B29C66/822; B29C66/8221; B29C66/83; B29C66/832; B29C66/8322; B29C66/834; B29C66/8341; B29C66/83411; B29C66/83413; B29C66/83421; B29C66/83423; B29C66/8351; B29C66/83511; B29C66/83513; B29C66/83541; B29C66/83543; B29K; B29K2995/00; B29K2995/0037; B29K2995/005; B31; B31B; B31B70/00; B31B70/60; B31B70/64
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-18 | 1951-11-17 | 1952-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-18 | 1955-11-17 | 1956-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-18 | 1959-11-17 | 1960-05-18 | $7700.00 | Window Closed / Lapsed |