US2730462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impregnation of absorbent materials
Assignee: McGraw Electric Co
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Filing: 1953-04-07
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Granted: 1956-01-10
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Expires: 1973-04-07
Abstract
No abstract record available.
Inventors
- 👤 Ewing Reld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:48
CPC Classifications
B; B31; B31B; B31B50/00; B31F; B31F7/00; B31F7/004; B31B50/74; B31B50/742; B31B50/745
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A PROCESS FOR IMPREGNATING AN ARTICLE HAVING A PERMEABLE WALL SURFACE DEFINING A CHAMBER HAVING TWO OPENINGS IN SAID WALL SURFACE, WHICH PROCESS COMPRISES MAINTAINING A BODY OF IMPREGNANT, CLOSING SAID CHAMBER AT ONCE OF SAID OPENINGS WITH A FIRST PLUG MEMBER HAVING A NORMALLY CLOSED APERTURE ADAPTED TO BE OPENED TO ADMIT SAID IMPREGNANT TO SAID CHAMBER AT A PREDETERMINED TIME AND RATE, CLOSING THE REMAINING OPENING WITH A SECOND PLUG MEMBER HAVING AN APERTURE NORMALLY OPEN TO COMMUNICATE WITH AN EVACUATING MEANS, POSITIONING SAID ARTICLE SO THAT THE SAID NORMALLY OPEN APERTURE IN SAID SECOND PLUG MEMBER IS NEAR THE TOP OF SAID CHAMBER,
Claim 2
Dependent Claim
106 words
A PROCESS FOR IMPREGNATING AN ARTICLE HAVING A PERMEABLE WALL SURFACE DEFINING A CHAMBER HAVING TWO OPENINGS IN SAID WALL SURFACE, WHICH PROCESS COMPRISES MAINTAINING A BODY OF IMPREGNANT, CLOSING SAID CHAMBER AT ONCE OF SAID OPENINGS WITH A FIRST PLUG MEMBER HAVING A NORMALLY CLOSED APERTURE ADAPTED TO BE OPENED TO ADMIT SAID IMPREGNANT TO SAID CHAMBER AT A PREDETERMINED TIME AND RATE, CLOSING THE REMAINING OPENING WITH A SECOND PLUG MEMBER HAVING AN APERTURE NORMALLY OPEN TO COMMUNICATE WITH AN EVACUATING MEANS, POSITIONING SAID ARTICLE SO THAT THE SAID NORMALLY OPEN APERTURE IN SAID SECOND PLUG MEMBER IS NEAR THE TOP OF SAID CHAMBER,
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) | 1959-01-09 | 1959-07-11 | 1960-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-09 | 1963-07-11 | 1964-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-09 | 1967-07-11 | 1968-01-10 | $7700.00 | Window Closed / Lapsed |