Patent US3494816A successfully refreshed from Google Patents.
US3494816A
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Heat-sealing apparatus for thermoplastic films,controlled by the temperature attained by the work from the heating element and the residual heat of its environment
Assignee: Individual
•
Filing: 1968-10-24
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Granted: 1970-02-10
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Expires: 1988-10-24
Abstract
No abstract record available.
Inventors
- 👤 Alfred Fener
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:32
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C65/18; B29C65/22; B29C65/221; B29C65/222; B29C65/229; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C66/80; B29C66/81; B29C66/814; B29C66/8141; B29C66/81427; B29C66/8145; B29C66/81457; B29C66/818; B29C66/8187; B29C66/81871; B29C66/90; B29C66/91; B29C66/912; B29C66/9121; B29C66/91211; B29C66/91212; B29C66/91231; B29C66/914; B29C66/9141; B29C66/91421; B29C66/9161; B29C66/91651; B29C66/91655; B29C66/432; B29C66/812; B29C66/8122; B29C66/81411; B29C66/81421; B29C66/81422; B29C66/92; B29C66/924; B29C66/9241; B29C66/94; B29C66/944; B29C66/96; B29C66/961
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2719567A
Cited
US3113198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-09 | 1973-08-11 | 1974-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-09 | 1977-08-11 | 1978-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-09 | 1981-08-11 | 1982-02-10 | $7700.00 | Window Closed / Lapsed |