US3346597A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Halogen-containing cyclic anhydrides
Assignee: Shell USA Inc
•
Filing: 1964-03-30
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Granted: 1967-10-10
•
Expires: 1984-03-30
Abstract
No abstract record available.
Inventors
- 👤 Acetis William De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:31
CPC Classifications
C; C07; C07C; C07C23/00; C07C23/02; C07C23/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
2 words
THE COMPOUND
Claim 2
Dependent Claim
2 words
THE COMPOUND
Claim 3
Dependent Claim
8 words
THE COMPOUND SELECTED FROM THE GROUP CONSISTING OF
Claim 4
Dependent Claim
8 words
THE COMPOUND SELECTED FROM THE GROUP CONSISTING OF
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) | 1970-10-09 | 1971-04-10 | 1971-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-09 | 1975-04-10 | 1975-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-09 | 1979-04-10 | 1979-10-10 | $7700.00 | Window Closed / Lapsed |