US3228955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Certain substituted oxazolidinones and pyrrolidinones
Assignee: Dow Chemical Co
•
Filing: 1962-01-18
•
Granted: 1966-01-11
•
Expires: 1982-01-18
Abstract
No abstract record available.
Inventors
- 👤 Richard A Hickner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:13
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/18; C07D207/22; C07D207/24; C07D207/26; C07D207/263; C07D207/27; C07D263/00; C07D263/02; C07D263/08; C07D263/16; C07D263/18; C07D263/20; C07D263/22; C07D265/00; C07D265/04; C07D265/06; C07D265/08; C07D265/10; C08; C08K; C08K5/00; C08K5/36; C08K5/37; C08K5/378
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A HETEROCYCLIC SULFIDE OF THE FORMULA
Claim 2
Dependent Claim
6 words
A HETEROCYCLIC SULFIDE OF THE FORMULA
References Cited (Backward Citations)
US2868801A
Cited
US2939868A
Cited
US2962504A
Cited
US2656328A
Cited
US2847416A
Cited
US3072652A
Cited
US3072672A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |