US2651708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary bar sealer for plastic films
Assignee: Dow Chemical Co
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Filing: 1951-12-08
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Granted: 1953-09-08
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Expires: 1971-12-08
Abstract
No abstract record available.
Inventors
- 👤 Robert S Mason
- 👤 Joseph P Graham
- 👤 Harold L Hearns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:17
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/80; B29C66/83; B29C66/834; B29C66/8351; B29C66/83511; B29C65/00; B29C65/02; B29C65/04; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C66/8341; B29C66/83411; B29C66/83415; B29C66/13; B29C66/131; B29C66/70; B29C66/71
Claims Analysis
Total Claims: 0
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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) | 1956-09-07 | 1957-03-09 | 1957-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-07 | 1961-03-09 | 1961-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-07 | 1965-03-09 | 1965-09-08 | $7700.00 | Window Closed / Lapsed |