US2624759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted poly aralkyl alkylene poly amino poly acetic acids and salts
Assignee: Individual
•
Filing: 1950-11-01
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Granted: 1953-01-06
•
Expires: 1970-11-01
Abstract
No abstract record available.
Inventors
- 👤 Frederick C Bersworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:51
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/48; A; A01; A01N; A01N37/00; A01N37/44; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10M; C10M1/00; C10M1/08; C11D9/00; C11D9/04; C11D9/045; C11D9/22; C11D9/30; C10L1/22; C10L1/222; C10L1/2222; C10L1/2225; C10L1/30; C10L1/301; C10M2201/00; C10M2201/02; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/24; C10M2215/26; C10M2217/00; C10M2217/04; C10M2217/046; C10M2217/06; C10N; C10N2010/00; C10N2010/02; C10N2040/00; C10N2040/20; Y; Y10; Y10S; Y10S424/00; Y10S424/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
THE COMPOUND CONFORMING TO THE STRUCTURAL FORMULA:
Claim 2
Dependent Claim
7 words
THE COMPOUND CONFORMING TO THE STRUCTURAL FORMULA:
References Cited (Backward Citations)
US868294A
Cited
US932266A
Cited
GB191318095A
Cited
DE642244C
Cited
US2195974A
Cited
US2489363A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-01-06 | 1956-07-07 | 1957-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-06 | 1960-07-07 | 1961-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-06 | 1964-07-07 | 1965-01-06 | $7700.00 | Window Closed / Lapsed |