US2727632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sintered porous vitreous disc with heater
Assignee: Individual
•
Filing: 1952-04-08
•
Granted: 1955-12-20
•
Expires: 1972-04-08
Abstract
No abstract record available.
Inventors
- 👤 Mack Arthur David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:19
CPC Classifications
C; C03; C03C; C03C12/00; B; B01; B01D; B01D35/00; B01D35/02; B01D35/18; C03B; C03B19/00; C03B19/06; C03C11/00; Y; Y10; Y10S; Y10S165/00; Y10S165/907; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/49155; Y10T29/49163; Y10T29/4998
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
A FILTRATION DEVICE COMPRISING A POROUS BODY OF SINTERED INERT VITREOUS MATERIAL IN WHICH IS EMBEDDED AN ELECTRIC RESISTANCE HEATING WIRE INSULATED WITH GLASS.
Claim 2
Dependent Claim
24 words
A FILTRATION DEVICE COMPRISING A POROUS BODY OF SINTERED INERT VITREOUS MATERIAL IN WHICH IS EMBEDDED AN ELECTRIC RESISTANCE HEATING WIRE INSULATED WITH GLASS.
References Cited (Backward Citations)
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US1334850A
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US1476116A
Cited
US1999770A
Cited
US2103434A
Cited
US2136170A
Cited
US2484003A
Cited
US2401797A
Cited
US2400091A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-19 | 1959-06-20 | 1959-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-19 | 1963-06-20 | 1963-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-19 | 1967-06-20 | 1967-12-20 | $7700.00 | Window Closed / Lapsed |