US3395134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chelating polymers and method of preparation
Assignee: Individual
•
Filing: 1964-05-14
•
Granted: 1968-07-30
•
Expires: 1984-05-14
Abstract
No abstract record available.
Inventors
- 👤 Gaetano F D'alelio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:19
CPC Classifications
D; D06; D06M; D06M14/00; D06M14/18; C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/34; C08F20/52; C08F20/54; C08F20/60; C08F255/00; C08F255/02; C08F291/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-30 | 1972-01-29 | 1972-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-30 | 1976-01-29 | 1976-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-30 | 1980-01-29 | 1980-07-30 | $7700.00 | Window Closed / Lapsed |