US3253033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methylenediphosphine products and process for the preparation thereof
Assignee: Monsanto Co
•
Filing: 1962-08-16
•
Granted: 1966-05-24
•
Expires: 1982-08-16
Abstract
No abstract record available.
Inventors
- 👤 Maier Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:39
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/50; C07F9/5027; C08; C08G; C08G79/00; C08G79/02; C08G79/06; C22; C22B; C22B3/00; C22B3/20; C22B3/26; C22B3/38; C22B3/385; C22B3/386; C22B3/387; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
24 words
A PROCESS FOR PREPARING A COMPOUND HAVING AT LEAST ONE PCH2P GROUPING COMPRISING HEATING IN AN INERT ATMOSPHERE A FIRST COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
24 words
A PROCESS FOR PREPARING A COMPOUND HAVING AT LEAST ONE PCH2P GROUPING COMPRISING HEATING IN AN INERT ATMOSPHERE A FIRST COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 4
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 5
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 6
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 7
Dependent Claim
5 words
A POLYMER HAVING THE FORMULA
Claim 8
Dependent Claim
5 words
A POLYMER HAVING THE FORMULA
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) | 1969-05-23 | 1969-11-22 | 1970-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-23 | 1973-11-22 | 1974-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-23 | 1977-11-22 | 1978-05-24 | $7700.00 | Window Closed / Lapsed |