US2933529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Symmetrical diquaternary ammonium compounds
Assignee: Rohm and Haas Co
•
Filing: 1956-01-09
•
Granted: 1960-04-19
•
Expires: 1976-01-09
Abstract
No abstract record available.
Inventors
- 👤 Jesse C H Hwa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:16
CPC Classifications
C; C11; C11D; C11D1/00; C11D1/38; C11D1/62; A; A01; A01N; A01N33/00; A01N33/02; A01N33/12; Y; Y10; Y10S; Y10S260/00; Y10S260/15; Y10S260/19; Y10S260/20; Y10S516/00; Y10S516/01; Y10S516/03; Y10S516/05; Y10S516/07
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
12 words
AS A NEW COMPOSITION OF MATTER, THE SYMMETRICAL COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
12 words
AS A NEW COMPOSITION OF MATTER, THE SYMMETRICAL COMPOUND HAVING THE FORMULA
Claim 3
Dependent Claim
11 words
AS A NEW COMPOSITION OF MATTER, THE COMPOUND HAVING THE FORMULA
Claim 4
Dependent Claim
11 words
AS A NEW COMPOSITION OF MATTER, THE COMPOUND HAVING THE FORMULA
References Cited (Backward Citations)
US2271378A
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US2287465A
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US2375853A
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US2525778A
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US2525777A
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US2525779A
Cited
US2716134A
Cited
US2627491A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |