Patent US2507520A successfully refreshed from Google Patents.
US2507520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Difunctional silahydrocarbons
Assignee: Dow Silicones Corp
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Filing: 1949-03-19
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Granted: 1950-05-16
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Expires: 1969-03-19
Abstract
No abstract record available.
Inventors
- 👤 Jr John T Goodwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:07
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
COMPOSITIONS OF THE GENERAL FORMULA R(R2SICH2)NSIRY2 IN WHICH EACH R REPRESENTS A RADICAL OF THE GROUP CONSISTING OF ALKYL AND MONOCYCLIC ARYL RADICALS, Y REPRESENTS A SUBSTITUENT OF THE GROUP CONSISTING OF ALKOXY RADICALS AND HALOGEN ATOMS, AND N IS AN INTEGER HAVING A VALUE OF FROM 1 TO 2 INCLUSIVE.
Claim 2
Dependent Claim
51 words
COMPOSITIONS OF THE GENERAL FORMULA R(R2SICH2)NSIRY2 IN WHICH EACH R REPRESENTS A RADICAL OF THE GROUP CONSISTING OF ALKYL AND MONOCYCLIC ARYL RADICALS, Y REPRESENTS A SUBSTITUENT OF THE GROUP CONSISTING OF ALKOXY RADICALS AND HALOGEN ATOMS, AND N IS AN INTEGER HAVING A VALUE OF FROM 1 TO 2 INCLUSIVE.
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) | 1953-05-15 | 1953-11-14 | 1954-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-15 | 1957-11-14 | 1958-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-15 | 1961-11-14 | 1962-05-16 | $7700.00 | Window Closed / Lapsed |