US2592273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quaternary ammonium salts of high molecular weight polymetaphosphoric acid
Assignee: EIDP Inc
•
Filing: 1948-11-13
•
Granted: 1952-04-08
•
Expires: 1968-11-13
Abstract
No abstract record available.
Inventors
- 👤 Max T Goebel
- 👤 Ralph K Iler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:58
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/06; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/26; C10M2215/30; C10N; C10N2010/00; C10N2010/08; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/07; Y10S516/905; Y10S516/907
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
A QUATERNARY AMMONIUM SALT OF POLYMETAPHOSPHORIC ACID CHARACTERIZED BY ITS MOLECULE
Claim 2
Dependent Claim
11 words
A QUATERNARY AMMONIUM SALT OF POLYMETAPHOSPHORIC ACID CHARACTERIZED BY ITS MOLECULE
References Cited (Backward Citations)
DE711866C
Cited
US2366129A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-08 | 1955-10-08 | 1956-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-08 | 1959-10-08 | 1960-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-08 | 1963-10-08 | 1964-04-08 | $7700.00 | Window Closed / Lapsed |