US2815329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing humic acid beads and product
Assignee: Shawinigan Chemicals Ltd
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Filing: 1955-10-14
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Granted: 1957-12-03
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Expires: 1975-10-14
Abstract
No abstract record available.
Inventors
- 👤 Leo M Germain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:52
CPC Classifications
C; C08; C08L; C08L97/00; C08L97/002
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
32 words
A COMPOSITION OF MATTER IN THE FORM OF APPROXIMATELY ROUNDED BEADS FOR ION EXCHANGE PURPOSES CONSISTING OF HUMIC ACID AND 5% TO 35% BY WEIGHT OF THE HUMIC ACID OF POLYVINYL ALCOHOL.
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) | 1960-12-02 | 1961-06-03 | 1961-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-02 | 1965-06-03 | 1965-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-02 | 1969-06-03 | 1969-12-03 | $7700.00 | Window Closed / Lapsed |