Patent US3948920A successfully refreshed from Google Patents.
Patent US3397036A successfully refreshed from Google Patents.
US3397036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of polyammonium phosphates
Assignee: LEATHER'S CHEMICAL COMPANY Ltd RAWDON HOUSE GREEN LANE YEADON LEEDS
•
Filing: 1965-11-09
•
Granted: 1968-08-13
•
Expires: 1985-11-09
Abstract
No abstract record available.
Inventors
- 👤 Narins Arthur Paul
- 👤 Austin James
- 👤 John D Ellis
- 👤 Conners Alan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:21
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/28; B; B01; B01J; B01J19/00; B01J19/18; B01J19/1806; C01B25/38; C01B25/40; C01B25/405; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00087; B01J2219/00094; B01J2219/00162; B01J2219/00189; B01J2219/18; B01J2219/182; B01J2219/19; B01J2219/194; B01J2219/1941; B01J2219/1946
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3323897A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |