Patent US2667423A successfully refreshed from Google Patents.
Patent US2887426A successfully refreshed from Google Patents.
US2887426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal insulation, building construction, and method of protecting thermal insulation against moisture attack
Assignee: Armstrong World Industries Inc
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Filing: 1955-03-31
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Granted: 1959-05-19
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Expires: 1975-03-31
Abstract
No abstract record available.
Inventors
- 👤 James P Knold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:42
CPC Classifications
E; E04; E04D; E04D3/00; E04D3/35; E04D3/351; E04D3/355; E04B; E04B1/00; E04B1/62; E04D3/354; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31815; Y10T428/31819
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A ROOF DECK INSULATION UNIT FOR USE UNDER CYCLIC HUMIDITY AND TEMPERATURE CONDITIONS COMPRISING A PLURALITY OF PILES OF WATER VAPOR PERVIOUS THERMAL INSULATING MATERIAL DISPOSED IN SUPERIMPOSED RELATIONSHIP AND WATER-RESISTANT SEALING MATERIAL CONSTITUTING A PARTIAL WATER VAPOR BARRIER INTERPOSED BETWEEN SAID PLIES OF INSULATING MATERIAL, SAID SEALING MATERIAL BEING CHARACTERIZED BY A WATER VAPOR PERMEANCE AT 70* F. WHEN TESTED IN ACCORDANCE WITH THE "WATER METHOD" AS HEREIN WHICH IS AT LEAST FIVE TIMES AS GREAT AS ITS WATER VAPOR PERMEANCE
Claim 2
Dependent Claim
82 words
A ROOF DECK INSULATION UNIT FOR USE UNDER CYCLIC HUMIDITY AND TEMPERATURE CONDITIONS COMPRISING A PLURALITY OF PILES OF WATER VAPOR PERVIOUS THERMAL INSULATING MATERIAL DISPOSED IN SUPERIMPOSED RELATIONSHIP AND WATER-RESISTANT SEALING MATERIAL CONSTITUTING A PARTIAL WATER VAPOR BARRIER INTERPOSED BETWEEN SAID PLIES OF INSULATING MATERIAL, SAID SEALING MATERIAL BEING CHARACTERIZED BY A WATER VAPOR PERMEANCE AT 70* F. WHEN TESTED IN ACCORDANCE WITH THE "WATER METHOD" AS HEREIN WHICH IS AT LEAST FIVE TIMES AS GREAT AS ITS WATER VAPOR PERMEANCE
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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) | 1962-05-18 | 1962-11-17 | 1963-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-18 | 1966-11-17 | 1967-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-18 | 1970-11-17 | 1971-05-19 | $7700.00 | Window Closed / Lapsed |