US3887615A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel butanoic acid derivatives
Assignee: F Hoffmann La Roche AG
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Filing: 1974-04-03
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Granted: 1975-06-03
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Expires: 1994-04-03
Abstract
Abstract Novel butanoic acid derivatives, bearing an ether grouping in the 4-position are disclosed, together with processes for the preparation of these compounds. These novel compounds inhibit ethylene production in plant tissues and therefore have utility as agents to retard the ripening of fruit during shipment and to prolong the life of cut flowers, and to prevent premature bud break in commercial fruit trees, thus avoiding frost kill.
Inventors
- 👤 Dennis Keith
- 👤 Manfred Weigele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:36
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/44; C07D209/48; A; A01; A01N; A01N37/00; A01N37/44
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
5 words
A compound of the formula
Claim 4
Dependent Claim
5 words
A compound of the formula
Claim 5
Dependent Claim
10 words
The compound of claim 1 of the formula D,L-O-(N-ethylaminoethyl) homoserine.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |