Patent US2802855A successfully refreshed from Google Patents.
US2802855A
Expired / Lapsed
US
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Carbamylalkenyl phosphoruscontaining esters
Assignee: Shell Development Co
•
Filing: 1953-04-27
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Granted: 1957-08-13
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Expires: 1973-04-27
Abstract
No abstract record available.
Inventors
- 👤 Richard R Whetstone
- 👤 Alan R Stiles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:44
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/44; C07F9/4434; C07F9/4442; C07F9/06; C07F9/08; C07F9/09; C07F9/113; C07F9/22; C07F9/24; C07F9/2404; C07F9/2412; C07F9/30; C07F9/32; C07F9/3258; C07F9/327; C07F9/40; C07F9/4071; C07F9/4078
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A COMPOUND REPRESENTED BY THE FORMULA:
Claim 2
Dependent Claim
6 words
A COMPOUND REPRESENTED BY THE FORMULA:
References Cited (Backward Citations)
US2494283A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-12 | 1961-02-11 | 1961-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-12 | 1965-02-11 | 1965-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-12 | 1969-02-11 | 1969-08-13 | $7700.00 | Window Closed / Lapsed |