Patent US3501571A successfully refreshed from Google Patents.
US3501571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel silicone compositions and method of preparing same
Assignee: GlaxoSmithKline LLC
•
Filing: 1966-11-18
•
Granted: 1970-03-17
•
Expires: 1986-11-18
Abstract
No abstract record available.
Inventors
- 👤 John Kai-Ching Yen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:40
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/74; A61K31/80; A61K9/00; A61K9/14; A61K9/141; A61K9/145; A61K9/20; A61K9/2072; A61K9/2077; A61K9/48; A61K9/4808; B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; B01D19/0404; B01D19/0409
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |