US3738937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyalkylene polyamino polykis methylene phosphonic acids and salts thereof and methods for producing same
Assignee: Henkel Corp
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Filing: 1970-05-08
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Granted: 1973-06-12
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Expires: 1990-05-08
Abstract
Abstract THIS INVENTION RELATES O POLYALKYLENE POLYAMINO POLYKIS METHYLENE POSPHONIC ACIDS AND THEIR SALTS AND TO METHODS OF PREPARING THE SAME SUBSTANTIALLY FREE OF ANALOGUES THEREOF, IN WHICH AMINE RADICALS CONTAIN UNSUB- STITUTED PRIMARY OR SECONDARY AMINE HYDROGEN, AND TO THE PROCESS FOR USING THE SAME. D R A W I N G
Inventors
- 👤 G Kautsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:54
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/167; C23F11/1676; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F5/14; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/3804; C07F9/3808; C07F9/3817; C23F14/00; C23F14/02
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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |