Patent US2557802A successfully refreshed from Google Patents.
US2557802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organosilyl alkyl amines and their hydrochlorides
Assignee: Dow Silicones Corp
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Filing: 1950-04-13
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Granted: 1951-06-19
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Expires: 1970-04-13
Abstract
No abstract record available.
Inventors
- 👤 Sommer Leo Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:13
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0803; C07F7/081
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
COMPOSITIONS OF THE GROUP CONSISTING OF SILANES OF THE GENERAL FORMULA
Claim 2
Dependent Claim
11 words
COMPOSITIONS OF THE GROUP CONSISTING OF SILANES OF 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) | 1954-06-18 | 1954-12-18 | 1955-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-18 | 1958-12-18 | 1959-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-18 | 1962-12-18 | 1963-06-19 | $7700.00 | Window Closed / Lapsed |