Patent US2915543A successfully refreshed from Google Patents.
US2915543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of compounds containing silicon and boron
Assignee: Wyeth Holdings LLC
•
Filing: 1957-09-24
•
Granted: 1959-12-01
•
Expires: 1977-09-24
Abstract
No abstract record available.
Inventors
- 👤 Stephen J Groszos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:59
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0836; C08; C08K; C08K5/00; C08K5/55; C10M2227/00; C10M2227/08; C10M2227/081; C10N; C10N2010/00; C10N2010/06; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/12; C10N2040/13; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
THE METHOD OF PREPARING A COMPOUND REPRESENTED BY THE GENERAL FORMULA
Claim 2
Independent Claim
11 words
THE METHOD OF PREPARING A COMPOUND REPRESENTED BY THE GENERAL FORMULA
References Cited (Backward Citations)
US2517945A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |