Patent US3493891A successfully refreshed from Google Patents.
US3332987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aminoalkylphosphinic acids
Assignee: Pennwalt Corp
•
Filing: 1963-06-24
•
Granted: 1967-07-25
•
Expires: 1983-06-24
Abstract
No abstract record available.
Inventors
- 👤 Ivan C Popoff
- 👤 Block Burton Peter
- 👤 Ludwig K Huber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:33
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/553; C07F9/5537; C07F9/28; C07F9/30; C07F9/301; C07F9/50; C07F9/53; C07F9/5304
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
4 words
COMPOUNDS HAVING THE STRUCTURE
Claim 2
Dependent Claim
4 words
COMPOUNDS HAVING THE STRUCTURE
Claim 3
Dependent Claim
2 words
AMINOMETHYL(METHYL)PHOSPHINIC ACID.
Claim 4
Dependent Claim
2 words
AMINOMETHYL(METHYL)PHOSPHINIC ACID.
Claim 5
Dependent Claim
2 words
AMINOMETHYL(ETHYL)PHOSPHINIC ACID.
Claim 6
Dependent Claim
2 words
AMINOMETHYL(ETHYL)PHOSPHINIC ACID.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-24 | 1971-01-23 | 1971-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-24 | 1975-01-23 | 1975-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-24 | 1979-01-23 | 1979-07-25 | $7700.00 | Window Closed / Lapsed |