Patent US2723987A successfully refreshed from Google Patents.
US2723987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carboxy organosilicon compounds
Assignee: Dow Silicones Corp
•
Filing: 1954-10-18
•
Granted: 1955-11-15
•
Expires: 1974-10-18
Abstract
No abstract record available.
Inventors
- 👤 John L Speier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:59
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/14; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0838
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A SILOXANE HAVING THE UNIT FORMULA
Claim 2
Dependent Claim
6 words
A SILOXANE HAVING THE UNIT 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) | 1958-11-14 | 1959-05-16 | 1959-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-14 | 1963-05-16 | 1963-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-14 | 1967-05-16 | 1967-11-15 | $7700.00 | Window Closed / Lapsed |