Patent US3673256A successfully refreshed from Google Patents.
US3673256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3-endo-methyl-3-exo(4{40 -methylpentanalyl)-2-methylenebicyclo{8 2.2.1{9 heptane and process for preparing same
Assignee: Procter and Gamble Co
•
Filing: 1969-09-03
•
Granted: 1972-06-27
•
Expires: 1989-09-03
Abstract
Abstract The compound, 3-endo-methyl-3-exo(4''-methylpentanalyl)-2methylenebicyclo(2.2.1)heptane, and a process for preparing this compound are disclosed. 3-endo-Methyl-3-exo(4''-methylpentanalyl)2-methylenebicyclo(2.2.1)heptane is valuable as a perfume component.
Inventors
- 👤 Kenneth M Pieper
- 👤 Thomas W Gibson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:26
CPC Classifications
C; C11; C11B; C11B9/00; C11B9/0042; C11B9/0046; C07; C07C; C07C45/00; C07C45/27; C07C45/29; C07C45/292; C07C47/00; C07C47/20; C07C47/225; C07C47/38; C07C47/44
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
21 words
A process for preparing 3-endo-methyl-3-exo(4''-methylpentanalyl)-2-methylenebicyclo(2.2.1)heptane comprising oxidizing 3-endo-methyl-3-exo(4''-methyl-5''-hydroxypentyl)-2 -methylenebicyclo(2.2.1)heptane with an oxidizing agent wherein said oxidizing agent is chromium trioxide-pyridinium complex.
Claim 2
Dependent Claim
26 words
The process of claim 2 wherein 3-endo-methyl-3-exo(4''-methyl-5''-hydroxypentyl)-2 -methylenebicyclo(2.2.1)heptane is dissolved in a solvent in a molar ratio to the solvent of from 1:1 to 1:1, 000.
Claim 3
Dependent Claim
54 words
The process of claim 3 wherein the chromium trioxide-pyridinium complex is prepared by dissolving chromium trioxide in pyridine in a weight ratio to pyridine of 1:5 to 1:20, recrystallizing the chromium trioxide-pyridinium complex, and subsequently dissolving the chromium trioxide-pyridinium complex in a solvent in a weight ratio to solvent of from 1:1 to 1:1,000.
Claim 4
Dependent Claim
24 words
The process of claim 4 wherein the chromium trioxide-pyridinium complex is used in a molar ratio to the 3-endo-methyl-3-exo(4''-methyl-5''-hydroxypentyl)-2 -methylenebicyclo(2.2.1)heptane of 6:1 to 20:1.
Claim 5
Dependent Claim
15 words
The process of claim 5 wherein the reaction temperature ranges from -70* to 50* C.
References Cited (Backward Citations)
FR891351A
Cited
US3444216A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |