Patent US2977383A successfully refreshed from Google Patents.
US2977383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Halogenated tetraalkyl pyrophosphates
Assignee: CF Spiess and Sohn GmbH and Co
•
Filing: 1959-07-27
•
Granted: 1961-03-28
•
Expires: 1979-07-27
Abstract
No abstract record available.
Inventors
- 👤 Perkow Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:34
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/098
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
1 words
TRIMETHYL-CHLOROMETHYL-PYROPHOSPHATE.
Claim 2
Dependent Claim
1 words
TRIMETHYL-CHLOROMETHYL-PYROPHOSPHATE.
References Cited (Backward Citations)
US2554757A
Cited
US2787629A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |