US3070582A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyaddition products of phosphines with unsaturated silanes
Assignee: Shell USA Inc
•
Filing: 1960-03-15
•
Granted: 1962-12-25
•
Expires: 1980-03-15
Abstract
No abstract record available.
Inventors
- 👤 Gutweiler Klemens
- 👤 Niebergall Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:33
CPC Classifications
C; C08; C08G; C08G79/00; C08G79/02; C08G79/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
NOVEL COPOLYMERS HAVING A MOLECULAR WEIGHT ABOVE ABOUT 1000 AND CONSISTING ESSENTIALLY OF PHOSPHORUS, CARBON AND SILICON, WHICH ARE THE REACTION PRODUCTS OF ORGANO SILANES HAVING THE FORMULA
Claim 2
Dependent Claim
28 words
NOVEL COPOLYMERS HAVING A MOLECULAR WEIGHT ABOVE ABOUT 1000 AND CONSISTING ESSENTIALLY OF PHOSPHORUS, CARBON AND SILICON, WHICH ARE THE REACTION PRODUCTS OF ORGANO SILANES HAVING THE FORMULA
References Cited (Backward Citations)
US2835690A
Cited
US2843615A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-24 | 1966-06-25 | 1966-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-24 | 1970-06-25 | 1970-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-24 | 1974-06-25 | 1974-12-25 | $7700.00 | Window Closed / Lapsed |