US3055939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unsymmetric bis-ammonium salts
Assignee: Irwin Neisler and Co
•
Filing: 1957-06-03
•
Granted: 1962-09-25
•
Expires: 1977-06-03
Abstract
No abstract record available.
Inventors
- 👤 Chester J Cavallito
- 👤 Gray Allan Poe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:58
CPC Classifications
A; A01; A01N; A01N33/00; A01N33/02; A01N33/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2813904A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-24 | 1966-03-26 | 1966-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-24 | 1970-03-26 | 1970-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-24 | 1974-03-26 | 1974-09-25 | $7700.00 | Window Closed / Lapsed |