Patent US1491678A successfully refreshed from Google Patents.
Patent US2681685A successfully refreshed from Google Patents.
US2681685A
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US
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Plastic welding device
Assignee: Individual
•
Filing: 1952-07-01
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Granted: 1954-06-22
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Expires: 1972-07-01
Abstract
No abstract record available.
Inventors
- 👤 Arkless Richard Smurthwaite
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:55
CPC Classifications
B; B05; B05C; B05C17/00; B05C17/005; B05C17/00523; B05C17/00526; B05C17/0053; B05C17/00536; B29; B29B; B29B13/00; B29B13/02; B29B13/022; B29C; B29C65/00; B29C65/02; B29C65/10; B29C65/12; B29C65/40; B29C66/00; B29C66/80; B29C66/83; B29C66/836; B29C66/84; B29C66/861; Y; Y10; Y10S; Y10S264/00; Y10S264/75
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1893093A
Cited
GB481669A
Cited
US2220545A
Cited
US2228291A
Cited
US2372737A
Cited
US2556609A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-21 | 1957-12-21 | 1958-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-21 | 1961-12-21 | 1962-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-21 | 1965-12-21 | 1966-06-22 | $7700.00 | Window Closed / Lapsed |