US2963838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film sealing mechanism for packaging machines
Assignee: WR Grace and Co
•
Filing: 1958-06-05
•
Granted: 1960-12-13
•
Expires: 1978-06-05
Abstract
No abstract record available.
Inventors
- 👤 John W Harrison
- 👤 Joe N Welch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:58
CPC Classifications
B; B65; B65B; B65B31/00; B65B31/04; B65B31/06; B29; B29C; B29C65/00; B29C65/02; B29C65/18; B29C65/22; B29C65/221; B29C65/224; B29C65/228; B29C65/229; B29C65/24; B29C65/30; B29C66/00; B29C66/001; B29C66/0012; B29C66/0014; B29C66/00145; B29C66/004; B29C66/0042; B29C66/0044; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/20; B29C66/23; B29C66/232; B29C66/40; B29C66/41; B29C66/43; B29C66/431; B29C66/4312; B29C66/43121; B29C66/70; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/81; B29C66/814; B29C66/8145; B29C66/81457; B29C66/816; B29C66/8161; B29C66/8167; B29C66/818; B29C66/8187; B29C66/82; B29C66/822; B29C66/8221; B29C66/8226; B29C66/83; B29C66/832; B29C66/8324; B29C66/84; B29C66/849; B29C66/90; B29C66/91; B29C66/914; B29C66/9141; B29C66/91421; B29C66/91423; B29C66/96; B29C66/967; B29C66/9672; B29C65/222; B29C65/223; B29C66/812; B29C66/8122; B29L; B29L2031/00; B29L2031/712; B29L2031/7128
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2281187A
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US2559368A
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US2651444A
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US2672268A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-13 | 1964-06-13 | 1964-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-13 | 1968-06-13 | 1968-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-13 | 1972-06-13 | 1972-12-13 | $7700.00 | Window Closed / Lapsed |