Patent US2749340A successfully refreshed from Google Patents.
US2749340A
Expired / Lapsed
US
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Sultame-nu-phosphoric acid diesters
Assignee: Ruhrchemie AG
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Filing: 1954-06-21
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Granted: 1956-06-05
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Expires: 1974-06-21
Abstract
No abstract record available.
Inventors
- 👤 Feichtinger Hans
- 👤 Tummes Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:50
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/6536; C07F9/6539; C07F9/6544
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
AS A NEW CHEMICAL COMPOUND A SULTAME-N-PHOSPHORIC ACID DIETHYLESTER HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
13 words
AS A NEW CHEMICAL COMPOUND A SULTAME-N-PHOSPHORIC ACID DIETHYLESTER HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |