US2589445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organosilicon acids
Assignee: Dow Silicones Corp
•
Filing: 1949-06-03
•
Granted: 1952-03-18
•
Expires: 1969-06-03
Abstract
No abstract record available.
Inventors
- 👤 Leo H Sommer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:37
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0803; C07F7/081; Y; Y10; Y10S; Y10S516/00; Y10S516/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
COMPOSITIONS OF THE GENERAL FORMULA
Claim 2
Dependent Claim
5 words
COMPOSITIONS OF THE GENERAL FORMULA
References Cited (Backward Citations)
US2488449A
Cited
US2479374A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-18 | 1955-09-17 | 1956-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-18 | 1959-09-17 | 1960-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-18 | 1963-09-17 | 1964-03-18 | $7700.00 | Window Closed / Lapsed |