US2646420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic linear condensation polymers containing phosphorus
Assignee: EIDP Inc
•
Filing: 1949-07-22
•
Granted: 1953-07-21
•
Expires: 1969-07-22
Abstract
No abstract record available.
Inventors
- 👤 Paul W Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:48
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/42; C08G63/00; C08G63/68; C08G63/692; C08G63/6924; C08G63/6926
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
27 words
A SYNTHETIC LINEAR CONDENSATION POLYMER CONTAINING PHOSPHORUS ATOMS AS A PART OF THE POLYMER CHAIN, AND HAVING A RECURRING STRUCTURAL UNIT SELECTED FROM THE GROUP CONSISTING OF
Claim 2
Dependent Claim
27 words
A SYNTHETIC LINEAR CONDENSATION POLYMER CONTAINING PHOSPHORUS ATOMS AS A PART OF THE POLYMER CHAIN, AND HAVING A RECURRING STRUCTURAL UNIT SELECTED FROM THE GROUP CONSISTING OF
References Cited (Backward Citations)
US2435252A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |