US3450797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for obtaining a controlled increase in the molecular weight of unsaturated polymeric hydrocarbons
Assignee: Huels AG
•
Filing: 1966-02-01
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Granted: 1969-06-17
•
Expires: 1986-02-01
Abstract
No abstract record available.
Inventors
- 👤 Johannes Schafer
- 👤 Gerhard Berg
- 👤 Frederico Engel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:01
CPC Classifications
C; C08; C08C; C08C19/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA483815A
Cited
US3135716A
Cited
US3211710A
Cited
US3172881A
Cited
US3192192A
Cited
GB992210A
Cited
US3317503A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-16 | 1972-12-16 | 1973-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-16 | 1976-12-16 | 1977-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-16 | 1980-12-16 | 1981-06-17 | $7700.00 | Window Closed / Lapsed |