US2832701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making drain-clear containers
Assignee: Pfizer Inc
•
Filing: 1953-09-25
•
Granted: 1958-04-29
•
Expires: 1973-09-25
Abstract
No abstract record available.
Inventors
- 👤 John J Miskel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:46
CPC Classifications
B; B65; B65D; B65D23/00; B65D23/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A METHOD OF MAKING A GLASS LIQUID DISPERSING CONTAINER CLEAR DRAINING WHICH COMPRISES THE STEPS OF WETTING ITS INNER WALLS WITH AN AQUEOUS SUSPENSION OF COLLODIAL SILICA HAVING A PH RANGING FROM ABOUT 3 TO 6, DRAINING OFF EXCESS SOLUTION, DRYING SAID CONTAINER AT AN ELEVATED TEMPERATURE PROVIDING BACTERIOLOGICAL STERLIZING CONDITIONS, AND SAID ELEVATED TEMPERATURE BEING MAINTAINED BELOW 350*C.
Claim 2
Independent Claim
59 words
A METHOD OF MAKING A GLASS LIQUID DISPERSING CONTAINER CLEAR DRAINING WHICH COMPRISES THE STEPS OF WETTING ITS INNER WALLS WITH AN AQUEOUS SUSPENSION OF COLLODIAL SILICA HAVING A PH RANGING FROM ABOUT 3 TO 6, DRAINING OFF EXCESS SOLUTION, DRYING SAID CONTAINER AT AN ELEVATED TEMPERATURE PROVIDING BACTERIOLOGICAL STERLIZING CONDITIONS, AND SAID ELEVATED TEMPERATURE BEING MAINTAINED BELOW 350*C.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-28 | 1961-10-28 | 1962-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-28 | 1965-10-28 | 1966-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-28 | 1969-10-28 | 1970-04-29 | $7700.00 | Window Closed / Lapsed |