US3197434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polycarbonamides from organic dicarboxylic acids and bis(aminopropoxyaryl)alkanes and process for producing the same
Assignee: Monsanto Co
•
Filing: 1960-03-17
•
Granted: 1965-07-27
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Expires: 1980-03-17
Abstract
No abstract record available.
Inventors
- 👤 Preston Jack
- 👤 William A H Huffman
- 👤 Ralph W Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:54
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
19 words
A LINEAR CARBONAMIDE POLYMER COMPOSED ESSENTIALLY OF RECURRING STRUCTURAL UNITS HAVING A FORMULA SELECTED FROM THE GROUP CONSISTING OF:
Claim 2
Dependent Claim
19 words
A LINEAR CARBONAMIDE POLYMER COMPOSED ESSENTIALLY OF RECURRING STRUCTURAL UNITS HAVING A FORMULA SELECTED FROM THE GROUP CONSISTING OF:
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) | 1968-07-26 | 1969-01-25 | 1969-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-26 | 1973-01-25 | 1973-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-26 | 1977-01-25 | 1977-07-27 | $7700.00 | Window Closed / Lapsed |