Patent US3290258A successfully refreshed from Google Patents.
US3290258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric organophosphorus compounds
Assignee: Monsanto Research Corp
•
Filing: 1962-10-23
•
Granted: 1966-12-06
•
Expires: 1982-10-23
Abstract
No abstract record available.
Inventors
- 👤 Morris L Nielsen
- 👤 Darrel M Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:55
CPC Classifications
C; C08; C08G; C08G79/00; C08G79/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
A POLYMERIC PHOSPHONAMIDE CONSISTING ESSENTIALLY OF THE REPEATING UNIT
Claim 2
Dependent Claim
9 words
A POLYMERIC PHOSPHONAMIDE CONSISTING ESSENTIALLY OF THE REPEATING UNIT
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) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |