Patent US4652263A successfully refreshed from Google Patents.
US2883411A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of heterocyclic phosphoruscontaining compounds
Assignee: Union Carbide Corp
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Filing: 1953-06-18
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Granted: 1959-04-21
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Expires: 1973-06-18
Abstract
No abstract record available.
Inventors
- 👤 William M Lanham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:53
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/527
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
15 words
AS NEW PRODUCTS, 2-HALOGEN-SUBSTITUTED ALKYL DERIVATIVE OF 2-OXO-1,3,2-DIOXAPHOSPHORINANES, SUCH PRODUCTS BEING DESIGNATED BY THE FORMULA:
Claim 2
Dependent Claim
15 words
AS NEW PRODUCTS, 2-HALOGEN-SUBSTITUTED ALKYL DERIVATIVE OF 2-OXO-1,3,2-DIOXAPHOSPHORINANES, SUCH PRODUCTS BEING DESIGNATED BY THE FORMULA:
Claim 3
Dependent Claim
16 words
PROCESS FOR PREPARING 2-HALOALKOXY DERIVATIVES OF THE 2-OXO-1,3,2-DIOXAPHOSPHORINANES WHICH COMPRISES REACTING AN OXIRANE OF THE FORMULA
Claim 4
Dependent Claim
16 words
PROCESS FOR PREPARING 2-HALOALKOXY DERIVATIVES OF THE 2-OXO-1,3,2-DIOXAPHOSPHORINANES WHICH COMPRISES REACTING AN OXIRANE OF THE FORMULA
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) | 1962-04-20 | 1962-10-20 | 1963-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-20 | 1966-10-20 | 1967-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-20 | 1970-10-20 | 1971-04-21 | $7700.00 | Window Closed / Lapsed |