US2921620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat sealing device
Assignee: Individual
•
Filing: 1957-05-02
•
Granted: 1960-01-19
•
Expires: 1977-05-02
Abstract
No abstract record available.
Inventors
- 👤 Dale A Dreisbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:34
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/80; B29C66/83; B29C66/834; B29C66/8341; B29C66/83411; B29C66/83413; B29C65/00; B29C65/02; B29C65/18; B29C66/40; B29C66/47; B29C66/472; B29C66/4722; B29C66/82; B29C66/822; B29C66/8221; B29C66/8227; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B31; B31B; B31B70/00; B31B70/74; B31B70/81; Y; Y10; Y10T; Y10T156/00; Y10T156/17; Y10T156/1702; Y10T156/1712; Y10T156/1734; Y10T156/1737; Y10T156/1739
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2734553A
Cited
US2372737A
Cited
US2556264A
Cited
US2799611A
Cited
US2768673A
Cited
US2749966A
Cited
US2795263A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |