US3208971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bis-silyl ureas and copolymers thereof
Assignee: Dow Silicones Corp
•
Filing: 1962-06-04
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Granted: 1965-09-28
•
Expires: 1982-06-04
Abstract
No abstract record available.
Inventors
- 👤 John W Gilkey
- 👤 Robert H Krahnke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:43
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/643; D06M15/6436; C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0803; C07F7/081; C07F7/0834; C07F7/18; C07F7/1804; C08; C08G; C08G12/00; C08G12/02; C08G12/40; C08G77/00; C08G77/48; C08G77/54; C08L; C08L83/00; C08L83/04; C08G77/04; C08G77/12; C08G77/22; C08G77/24; C08G77/42; C08G77/452; C08G77/458
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
6 words
AN ORGANOSILICON COMPOUNDS OF THE FORMULA
Claim 2
Dependent Claim
6 words
AN ORGANOSILICON COMPOUNDS OF THE FORMULA
Claim 3
Dependent Claim
18 words
A SILOXANE COPOLYMER CONSISTING OF FROM 2 TO 50 PERCENT BY WEIGHT OF SILOXANE UNITS OF THE FORMULA
Claim 4
Dependent Claim
18 words
A SILOXANE COPOLYMER CONSISTING OF FROM 2 TO 50 PERCENT BY WEIGHT OF SILOXANE UNITS OF THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |