US3228998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid polyphosphate esters
Assignee: Union Oil Company of California
•
Filing: 1960-10-17
•
Granted: 1966-01-11
•
Expires: 1980-10-17
Abstract
No abstract record available.
Inventors
- 👤 William L Fierce
- 👤 Walter J Sandner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:23
CPC Classifications
C; C10; C10M; C10M3/00; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/093; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2225/00; C10M2225/02; C10N; C10N2040/00; C10N2040/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A POLYPHOSPHATE OF THE FORMULA
Claim 2
Dependent Claim
5 words
A POLYPHOSPHATE OF THE FORMULA
References Cited (Backward Citations)
US2636876A
Cited
US2586897A
Cited
US2842462A
Cited
US2728790A
Cited
US2879287A
Cited
US2952666A
Cited
US3013991A
Cited
US2909559A
Cited
US2990421A
Cited
US3005007A
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 |