US2828312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New quaternary salts
Assignee: —
•
Filing: —
•
Granted: 1958-03-25
•
Expires: 1975-03-25
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:02
CPC Classifications
C; C07; C07D; C07D451/00; C07D451/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A QUATERNARY SALT OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
7 words
A QUATERNARY SALT OF THE GENERAL FORMULA:
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) | 1961-03-24 | 1961-09-23 | 1962-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-24 | 1965-09-23 | 1966-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-24 | 1969-09-23 | 1970-03-25 | $7700.00 | Window Closed / Lapsed |