US2867642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Divinyltin oxide and method of preparation
Assignee: Primerica Inc
•
Filing: 1956-09-18
•
Granted: 1959-01-06
•
Expires: 1976-09-18
Abstract
No abstract record available.
Inventors
- 👤 Hugh E Ramsden
- 👤 Sanders D Rosenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:25
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/22; C07F7/2224
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
21 words
A PROCESS FOR PREPARING DIVINYLTIN OXIDE COMPRISING HYDROLYZING A COMPOUND SELECTED FROM THE CLASS CONSISTING OF DIVINYLTIN CHLORIDE AND DIVINYLTIN BROMIDE.
References Cited (Backward Citations)
US2731484A
Cited
US2683705A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-05 | 1962-07-07 | 1963-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-05 | 1966-07-07 | 1967-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-05 | 1970-07-07 | 1971-01-06 | $7700.00 | Window Closed / Lapsed |