Patent US3549740A successfully refreshed from Google Patents.
US3549740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of polyester fibers to improve adhesion of rubber
Assignee: EIDP Inc
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Filing: 1966-12-14
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Granted: 1970-12-22
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Expires: 1986-12-14
Abstract
No abstract record available.
Inventors
- 👤 Eckhard Christian Augu Schwarz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:58
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08J5/06; B; B29; B29D; B29D30/00; B29D30/06; B29D30/38; B29D30/40; D; D01; D01F; D01F11/00; D01F11/04; D01F11/08; D01F6/00; D01F6/58; D01F6/62; C08J2321/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2844488A
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US2934400A
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US2938823A
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US3090716A
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US3178391A
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US3117173A
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US3225094A
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US3233019A
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US3452130A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |