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Patent US2452198A successfully refreshed from Google Patents.
US2452198A
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US
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Polymerization of olefins
Assignee: Sunoco Inc
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Filing: 1945-10-30
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Granted: 1948-10-26
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Expires: 1965-10-30
Abstract
No abstract record available.
Inventors
- 👤 Robert M Kennedy
- 👤 Stanford J Hetzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:28
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/24; B; B01; B01J; B01J23/00; B01J23/70; B01J37/00; B01J37/02; B01J37/0201; C07C2521/00; C07C2521/12; C07C2523/00; C07C2523/70; C07C2523/74; C07C2523/75; C07C2523/755; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/906
Claims Analysis
Total Claims: 0
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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) | 1951-10-26 | 1952-04-26 | 1952-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-26 | 1956-04-26 | 1956-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-26 | 1960-04-26 | 1960-10-26 | $7700.00 | Window Closed / Lapsed |