Patent US3515747A successfully refreshed from Google Patents.
US3515747A
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US
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Polyesters,polyamides,and polyesteramides of mixtures of nitrilotriacetic and n - (acetamide) - iminodiacetic acids
Assignee: WR Grace and Co
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Filing: 1968-10-10
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Granted: 1970-06-02
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Expires: 1988-10-10
Abstract
No abstract record available.
Inventors
- 👤 Nelson S Marans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:48
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/44; C08G63/00; C08G63/68; C08G63/685; C08G63/6854; C08G69/02; C08G69/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR842176A
Cited
US2463977A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-01 | 1973-12-01 | 1974-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-01 | 1977-12-01 | 1978-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-01 | 1981-12-01 | 1982-06-02 | $7700.00 | Window Closed / Lapsed |