US3259590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymers of oxacycloalkanes prepared with organic aluminum co-catalyst
Assignee: Hoechst AG
•
Filing: 1960-05-25
•
Granted: 1966-07-05
•
Expires: 1980-05-25
Abstract
No abstract record available.
Inventors
- 👤 Weissermel Klaus
- 👤 Fischer Edgar
- 👤 Kullmar Klaus
- 👤 Reiher Manfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:01
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/06; C08G65/16; C08G65/18; F; F02; F02B; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A PROCESS FOR THE PRODUCTION OF POLYETHERS OF HIGH MOLECULAR WEIGHT WHICH COMPRISES THE STEP OF POLYMERIZING, AT A TEMPERATURE WITHIN THE RANGE OF -80 TO 150* C., AT LEAST ONE MONOMER OF THE GROUP CONSISTING OF SATURATED OXACYCLOBUTANES AND OXACYCLOPENTANE IN THE PRESENCE OF A COMBINATION OF (A) AT LEAST ONE ORGANIC ALUMINUM COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
58 words
A PROCESS FOR THE PRODUCTION OF POLYETHERS OF HIGH MOLECULAR WEIGHT WHICH COMPRISES THE STEP OF POLYMERIZING, AT A TEMPERATURE WITHIN THE RANGE OF -80 TO 150* C., AT LEAST ONE MONOMER OF THE GROUP CONSISTING OF SATURATED OXACYCLOBUTANES AND OXACYCLOPENTANE IN THE PRESENCE OF A COMBINATION OF (A) AT LEAST ONE ORGANIC ALUMINUM COMPOUND OF THE FORMULA
References Cited (Backward Citations)
FR898269A
Cited
US2856370A
Cited
US2947722A
Cited
US2722340A
Cited
US2895922A
Cited
US2891837A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |