Patent US3251830A successfully refreshed from Google Patents.
US3251830A
Expired / Lapsed
US
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Tetrahalodiazocyclopentadiene and its preparation
Assignee: Hooker Chemical Corp
•
Filing: 1963-09-19
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Granted: 1966-05-17
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Expires: 1983-09-19
Abstract
No abstract record available.
Inventors
- 👤 Knutson David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:10
CPC Classifications
C; C07; C07C; C07C23/00; C07C23/18; C07C23/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
1 words
TETRAHALODIAZOCYCLOPENTADIENE.
Claim 2
Dependent Claim
1 words
TETRAHALODIAZOCYCLOPENTADIENE.
Claim 3
Dependent Claim
16 words
A PROCESS FOR MAKING A TETRAHALODIAZOCYCLOPENTADIENE WHICH COMPRISES OXIDIZING A CORRESPONDING TETRAHALOCYCLOPENTADIENONE HYDRAZONE TO THE TETRAHALODIAZOCYCLOPENTADIENE.
Claim 4
Dependent Claim
16 words
A PROCESS FOR MAKING A TETRAHALODIAZOCYCLOPENTADIENE WHICH COMPRISES OXIDIZING A CORRESPONDING TETRAHALOCYCLOPENTADIENONE HYDRAZONE TO THE TETRAHALODIAZOCYCLOPENTADIENE.
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) | 1969-05-16 | 1969-11-15 | 1970-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-16 | 1973-11-15 | 1974-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-16 | 1977-11-15 | 1978-05-17 | $7700.00 | Window Closed / Lapsed |