US2727900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New classes of cyclopropanes and processes of preparing them
Assignee: Airco Inc
•
Filing: 1953-02-16
•
Granted: 1955-12-20
•
Expires: 1973-02-16
Abstract
No abstract record available.
Inventors
- 👤 Julius G Shukys
- 👤 Fiordalisi Fernanda Misani
- 👤 Croix Louise Speers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:34
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/35; C07C17/093; C07C17/16; C07C17/23; C07C22/00; C07D; C07D231/00; C07D231/02; C07D231/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
TRIFLUOROMETHYLCYCLOPROPANES REPRESENTED BY THE FORMULA:
Claim 2
Dependent Claim
5 words
TRIFLUOROMETHYLCYCLOPROPANES REPRESENTED BY THE FORMULA:
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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Cited
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Cited
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Cited
US2515306A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-19 | 1959-06-20 | 1959-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-19 | 1963-06-20 | 1963-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-19 | 1967-06-20 | 1967-12-20 | $7700.00 | Window Closed / Lapsed |