Patent US3351658A successfully refreshed from Google Patents.
US3351658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amide reaction products of amino acid chelating compounds
Assignee: Individual
•
Filing: 1966-09-20
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Granted: 1967-11-07
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Expires: 1986-09-20
Abstract
No abstract record available.
Inventors
- 👤 Frederick C Bersworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:20
CPC Classifications
C; C07; C07C; C07C243/00; C07C243/24; C07C243/26; C07C243/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
THE REACTION PRODUCT OF A COMPOUND HAVING A FORMULA GIVEN BY:
Claim 2
Dependent Claim
11 words
THE REACTION PRODUCT OF A COMPOUND HAVING A FORMULA GIVEN BY:
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) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |