Patent US3531359A successfully refreshed from Google Patents.
US3531359A
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Apparatus for heat-sealing of plastic materials
Assignee: PPG Architectural Coatings Canada Inc
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Filing: 1967-03-27
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Granted: 1970-09-29
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Expires: 1987-03-27
Abstract
No abstract record available.
Inventors
- 👤 Elwyn David Jones
- 👤 David James Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:59
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/74; B29C65/743; B29C65/7441; B29C65/02; B29C65/18; B29C65/24; B29C65/30; B29C65/749; B29C65/78; B29C65/7858; B29C65/7888; B29C65/7891; B29C66/00; B29C66/01; B29C66/05; B29C66/20; B29C66/24; B29C66/244; B29C66/348; B29C66/40; B29C66/41; B29C66/43; B29C66/431; B29C66/80; B29C66/81; B29C66/816; B29C66/8161; B29C66/818; B29C66/8181; B29C66/81815; B29C66/82; B29C66/824; B29C66/8242; B29C66/83; B29C66/832; B29C66/8322; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/84; B29C66/851; B29C66/8511; B31; B31B; B31B70/00; B31B70/60; B31B70/64; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1054; Y10T156/12; Y10T156/1313
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) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |