Patent US2957900A successfully refreshed from Google Patents.
US2957900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compounds containing boron and silicon
Assignee: Wyeth Holdings LLC
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Filing: 1957-09-16
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Granted: 1960-10-25
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Expires: 1977-09-16
Abstract
No abstract record available.
Inventors
- 👤 Stephen J Groszos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:40
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/30; C10L1/301; C10L1/303; C07; C07F; C07F5/00; C07F5/02; C07F5/025; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0836
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A COMPOUND REPRESENTED BY THE GENERAL FORMULA
Claim 2
Dependent Claim
7 words
A COMPOUND REPRESENTED BY THE GENERAL 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) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |