US3720539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for improving the surface adhesion of shaped articles made from polyesters
Assignee: Kalle GmbH and Co KG
•
Filing: 1968-04-22
•
Granted: 1973-03-13
•
Expires: 1988-04-22
Abstract
Abstract This invention relates to a process for modifying the surface of a shaped article made from a polyester which comprises treating the article with an aqueous solution containing a halogenated fatty acid, a wetting agent and a polymer which is compatible with the halogenated fatty acid, and drying the treated article.
Inventors
- 👤 M Seibel
- 👤 K Thoese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:10
CPC Classifications
B; B21; B21D; B21D26/00; B21D26/14; C; C08; C08J; C08J7/00; C08J7/04; C08J7/043; C08J7/042; C08J7/0427; C08J7/056; G; G03; G03C; G03C1/00; G03C1/76; G03C1/91; G03C1/93; H; H01; H01F; H01F7/00; H01F7/06; H01F7/20; H01F7/202; C08J2367/00; C08J2367/02; C08J2427/00; C08J2427/02; C08J2427/04; C08J2427/06; C08J2429/00; C08J2429/02; C08J2429/04; C08J2431/00; C08J2431/02; C08J2431/04; C08J2433/00; C08J2433/24; C08J2433/26
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2893896A
Cited
US3058939A
Cited
US3271190A
Cited
US3396046A
Cited
US3337364A
Cited
US3374197A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |