US2968667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bis (perfluoroalkylmethyl) sulfites and their preparation
Assignee: Pennwalt Corp
•
Filing: 1956-12-10
•
Granted: 1961-01-17
•
Expires: 1976-12-10
Abstract
No abstract record available.
Inventors
- 👤 Francis E Lawlor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:59
CPC Classifications
C; C07; C07C; C07C301/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
A BIS(PERFLUOROALKYLMETHYL) SULFITE HAVING THE STRUCTURAL FORMUAL (R1CH2O)2SO IN WHICH R1 IS A PERFLUOROALKYL GROUP WITH FROM 1 TO 1I CARBON ATOMS.
Claim 2
Dependent Claim
22 words
A BIS(PERFLUOROALKYLMETHYL) SULFITE HAVING THE STRUCTURAL FORMUAL (R1CH2O)2SO IN WHICH R1 IS A PERFLUOROALKYL GROUP WITH FROM 1 TO 1I CARBON ATOMS.
References Cited (Backward Citations)
US2553721A
Cited
US2819211A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-17 | 1964-07-18 | 1965-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-17 | 1968-07-18 | 1969-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-17 | 1972-07-18 | 1973-01-17 | $7700.00 | Window Closed / Lapsed |