Patent US2106561A successfully refreshed from Google Patents.
US2937211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical process
Assignee: EIDP Inc
•
Filing: 1958-10-17
•
Granted: 1960-05-17
•
Expires: 1978-10-17
Abstract
No abstract record available.
Inventors
- 👤 Ludwig Richard Eli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:16
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/22; C07C5/27; C07C5/29; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A METHOD FOR PREPARING ADAMANTANE COMPRISING REARRANGING TETRAHYDRODICYCLOPENTADIENE AT BETWEEN ROOM TEMPERATURE AND THE DECOMPOSITION TEMPERATURE OF SAID REACTANT WITH AT LEAST ONE MOLE OF HYDROGEN FLUORIDE PER MOLE OF REACTANT IN THE PRESENCE OF BORON TRIFLUORIDE, SAID REACTION MIXTURE BEING UNDER SUFFICIENT PRESSURE TO MAINTAIN AT LEAST PART OF THE HYDROGEN FLUORIDE IN A LIQUID PHASE.
Claim 2
Independent Claim
57 words
A METHOD FOR PREPARING ADAMANTANE COMPRISING REARRANGING TETRAHYDRODICYCLOPENTADIENE AT BETWEEN ROOM TEMPERATURE AND THE DECOMPOSITION TEMPERATURE OF SAID REACTANT WITH AT LEAST ONE MOLE OF HYDROGEN FLUORIDE PER MOLE OF REACTANT IN THE PRESENCE OF BORON TRIFLUORIDE, SAID REACTION MIXTURE BEING UNDER SUFFICIENT PRESSURE TO MAINTAIN AT LEAST PART OF THE HYDROGEN FLUORIDE IN A LIQUID PHASE.
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) | 1963-05-17 | 1963-11-16 | 1964-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-17 | 1967-11-16 | 1968-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-17 | 1971-11-16 | 1972-05-17 | $7700.00 | Window Closed / Lapsed |