Patent US3443277A successfully refreshed from Google Patents.
US3443277A
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Apparatus for producing a laminate having mechanically interlocking layers
Assignee: Shell USA Inc
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Filing: 1965-11-05
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Granted: 1969-05-13
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Expires: 1985-11-05
Abstract
No abstract record available.
Inventors
- 👤 Hans Frielingsdorf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:43
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/01; B29C66/341; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29C48/14; B29C48/16; B29C48/18; B29C48/21; B29C48/25; B29C48/30; B29C48/305; B29C48/307; B29C65/00; B29C65/02; B29C65/14; B29C65/1429; B29C65/1432; B29C65/1464; B29C65/18; B29C65/20; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/45; B29C66/70; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/81; B29C66/814; B29C66/8141; B29C66/81411; B29C66/81415; B29C66/81417; B29C66/81433; B29C66/83; B29C66/834; B29C66/8341; B29C66/83411; B29C66/83413; B32; B32B; B32B27/00; C; C03; C03B; C03B5/00; C03B5/16; C03B5/23; B29C48/09; B29C65/2092; B29C66/71; B29L; B29L2009/00
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) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |