US2755304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyhydroxyl polyamino compounds
Assignee: Dow Chemical Co
•
Filing: 1953-02-20
•
Granted: 1956-07-17
•
Expires: 1973-02-20
Abstract
No abstract record available.
Inventors
- 👤 Frederick C Bersworth
- 👤 Albert E Frost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:04
CPC Classifications
C; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F5/12; Y; Y10; Y10S; Y10S424/00; Y10S424/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
CHEMICAL COMPOUND CORRESPONDING TO THE GENERAL FORMULA:
Claim 2
Dependent Claim
7 words
CHEMICAL COMPOUND CORRESPONDING TO 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) | 1959-07-17 | 1960-01-16 | 1960-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-17 | 1964-01-16 | 1964-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-17 | 1968-01-16 | 1968-07-17 | $7700.00 | Window Closed / Lapsed |