Patent US2613204A successfully refreshed from Google Patents.
US2613204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
of urea
Assignee: —
•
Filing: —
•
Granted: 1952-10-07
•
Expires: 1969-10-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:35
CPC Classifications
C; C07; C07D; C07D319/00; C07D319/04; C07D319/02; C07D491/00; C07D491/02; C07D491/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
AS A NEW COMPOSITION OF MATTER, A CRYSTALLINE MOLECULAR COMPLEX OF UREA WITH AN UNSUBSTITUTED OXACYCLOHYDROCARBON HAVING ONLY C, H AND O ATOMS AND CONTAINING FROM 5 TO 6 ATOMS IN THE OXACYCLOHYDROCARBON RING, AND IN WHICH THE ONLY OXYGEN PRESENT FORMS A PART OF THE OXACYCLOHYDROCARBON RING.
Claim 2
Dependent Claim
48 words
AS A NEW COMPOSITION OF MATTER, A CRYSTALLINE MOLECULAR COMPLEX OF UREA WITH AN UNSUBSTITUTED OXACYCLOHYDROCARBON HAVING ONLY C, H AND O ATOMS AND CONTAINING FROM 5 TO 6 ATOMS IN THE OXACYCLOHYDROCARBON RING, AND IN WHICH THE ONLY OXYGEN PRESENT FORMS A PART OF THE OXACYCLOHYDROCARBON RING.
References Cited (Backward Citations)
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Cited
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US2090620A
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US2300134A
Cited
US2257384A
Cited
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US2376008A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-07 | 1956-04-07 | 1956-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-07 | 1960-04-07 | 1960-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-07 | 1964-04-07 | 1964-10-07 | $7700.00 | Window Closed / Lapsed |