Patent US2818362A successfully refreshed from Google Patents.
US2818362A
Expired / Lapsed
US
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N-vinyl-2-oxazolidone and polymerization products thereof and method of making
Assignee: Wyeth Holdings LLC
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Filing: 1954-05-18
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Granted: 1957-12-31
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Expires: 1974-05-18
Abstract
No abstract record available.
Inventors
- 👤 Erhart K Drechsel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:02
CPC Classifications
C; C07; C07D; C07D263/00; C07D263/02; C07D263/08; C07D263/16; C07D263/18; C07D263/20; C07D263/22; Y; Y10; Y10S; Y10S424/00; Y10S424/02; Y10S8/00; Y10S8/18; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
1 words
N-VINYL-2-OXAZOLIDONE.
Claim 2
Dependent Claim
1 words
N-VINYL-2-OXAZOLIDONE.
References Cited (Backward Citations)
US1864884A
Cited
US2399118A
Cited
US2522501A
Cited
US2541152A
Cited
US2643990A
Cited
US2656328A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-30 | 1961-07-01 | 1961-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-30 | 1965-07-01 | 1965-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-30 | 1969-07-01 | 1969-12-31 | $7700.00 | Window Closed / Lapsed |