US3755311A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferrocene derivatives
Assignee: United States Department of the Navy
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Filing: 1967-09-19
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Granted: 1973-08-28
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Expires: 1987-09-19
Abstract
Abstract ARE DISCLOSED WHEREIN R is O, NR'' and S and each R'' is hydrogen, lower alkyl, phenyl, cyano and nitro. Compounds useful as burning rate catalysts for solid propellants characterized by low volatility and having the formula
Inventors
- 👤 Galler R Zimmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:17
CPC Classifications
C; C07; C07F; C07F17/00; C07F17/02; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/28; C07D239/46; C07D239/60; C07D239/62; C07D263/00; C07D263/52; C07D263/62
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
8 words
The compound of claim 1 of the formula
Claim 2
Dependent Claim
8 words
The compound of claim 1 of the formula
Claim 3
Dependent Claim
10 words
The compound of claim 1 which is 5-ferrocenylmethylene barbituric acid.
References Cited (Backward Citations)
US3271402A
Cited
US3324125A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |