Patent US2520104A successfully refreshed from Google Patents.
US2520104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
(beta-nitroalkyl) amines and methods for production of same
Assignee: Individual
•
Filing: 1947-05-01
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Granted: 1950-08-22
•
Expires: 1967-05-01
Abstract
No abstract record available.
Inventors
- 👤 Carl T Bahner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:45
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/60; C07C213/00; C07C213/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
POLY-(2-NITROALKYL) AMINES HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
6 words
POLY-(2-NITROALKYL) AMINES HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-21 | 1954-02-20 | 1954-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-21 | 1958-02-20 | 1958-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-21 | 1962-02-20 | 1962-08-22 | $7700.00 | Window Closed / Lapsed |