US3270655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air curtain door seal
Assignee: Individual
•
Filing: 1964-03-25
•
Granted: 1966-09-06
•
Expires: 1984-03-25
Abstract
No abstract record available.
Inventors
- 👤 Howard P Guirl
- 👤 James N Guirl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:49
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/06; F24F13/072; F24F9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
IN AN AIR CURTAIN SEAL FOR AN OVEN: (A) A COMPARTMENT HAVING AN OPENING, (B) MEANS AT OPPOSITE SIDES OF THE OPENING DIRECTING AN AIR FLOW INTO AND GENERALLY ACROSS THE OPENING AT THE TOP PART OF THE OPENING, AND DIRECTING AN AIR FLOW OUTWARDLY OF AND GENERALLY ACROSS THE OPENING AT THE LOWER PART OF THE OPENING, AND (C) BLOWER MEANS SUPPLYING AIR TO THE AIR-DIRECTING MEANS,
Claim 2
Dependent Claim
68 words
IN AN AIR CURTAIN SEAL FOR AN OVEN: (A) A COMPARTMENT HAVING AN OPENING, (B) MEANS AT OPPOSITE SIDES OF THE OPENING DIRECTING AN AIR FLOW INTO AND GENERALLY ACROSS THE OPENING AT THE TOP PART OF THE OPENING, AND DIRECTING AN AIR FLOW OUTWARDLY OF AND GENERALLY ACROSS THE OPENING AT THE LOWER PART OF THE OPENING, AND (C) BLOWER MEANS SUPPLYING AIR TO THE AIR-DIRECTING MEANS,
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) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |