US3533998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyesters and polyamides bearing pendant quaternary ammonium groups
Assignee: EIDP Inc
•
Filing: 1967-06-08
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Granted: 1970-10-13
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Expires: 1987-06-08
Abstract
No abstract record available.
Inventors
- 👤 Seymour Yolles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:38
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/685; C08G63/6852; C08G63/02; C08G63/60; C08G63/91; C08G63/914; C08G73/00; C08G73/06; C08G73/10; Y; Y10; Y10S; Y10S524/00; Y10S524/91; Y10S524/911
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) | 1973-10-12 | 1974-04-13 | 1974-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-12 | 1978-04-13 | 1978-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-12 | 1982-04-13 | 1982-10-13 | $7700.00 | Window Closed / Lapsed |