US2979519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New cyclotrisiloxanes
Assignee: Dow Silicones Corp
•
Filing: 1956-06-27
•
Granted: 1961-04-11
•
Expires: 1976-06-27
Abstract
No abstract record available.
Inventors
- 👤 Ogden R Pierce
- 👤 George W Holbrook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:48
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/21; C07F7/08; C07F7/0834; C07F7/0838
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A CYCLIC TRISOLOXANE OF THE UNIT FORMULA
Claim 2
Dependent Claim
7 words
A CYCLIC TRISOLOXANE OF THE UNIT 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) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |