US2881171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New heterocyclic compounds, polymers thereof and methods of making them
Assignee: Rohm and Haas Co
•
Filing: 1955-08-18
•
Granted: 1959-04-07
•
Expires: 1975-08-18
Abstract
No abstract record available.
Inventors
- 👤 Elinor M Hankins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:05
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3442; C02; C02F; C02F1/00; C02F1/52; C02F1/54; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/34; Y; Y10; Y10S; Y10S260/00; Y10S260/15; Y10S260/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A COMPOUND HAVING THE FORMULA:
Claim 2
Dependent Claim
5 words
A COMPOUND HAVING THE 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) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |