Patent US3601628A successfully refreshed from Google Patents.
Patent US3036305A successfully refreshed from Google Patents.
US3036305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of water
Assignee: Wright Chemical Corp
•
Filing: 1959-06-23
•
Granted: 1962-05-22
•
Expires: 1979-06-23
Abstract
No abstract record available.
Inventors
- 👤 Kenkere C Channabasappa
- 👤 Paul G Bird
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:01
CPC Classifications
C; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F5/12; C02F5/125
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
22 words
A WATER TREATING COMPOSITION COMPRISING SODIUM TRIPOLYPHOSPHATE, A WATER SOLUBLE STRAIGHT CHAIN ALKYL SUBSTITUTED TYPE QUATERNARY AMMONIUM SALT HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-21 | 1965-11-20 | 1966-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-21 | 1969-11-20 | 1970-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-21 | 1973-11-20 | 1974-05-22 | $7700.00 | Window Closed / Lapsed |